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Слова на букву metr-noe (2629)

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multifetation
SYN: superfetation.
multifid
Divided into many clefts or segments. SYN: multifidus (1). [L. multifidus, fr. multus, much, + findo, to cleave]
multifidus
1. SYN: multifid. 2. See m. (muscle). [L.]
multifocal
Relating to or arising from many foci.
multiform
SYN: polymorphic.
multiglandular
SYN: pluriglandular.
multigravida
A pregnant woman who has been pregnant one or more times previously. [ multi- + L. gravida, pregnant]
multilobular
Having many lobules.
multilocal
Denoting traits with an etiology comprising effects of multiple genetic loci operating together and simultaneously. Cf.:galtonian.
multilocular
Many-celled; having many compartments or loculi. SYN: plurilocular.
multimammae
SYN: polymastia. [ multi- + L. mamma, breast]
multinodal
Having many nodes.
multinodular, multinodulate
Having many nodules.
multinuclear, multinucleate
Having two or more nuclei. SYN: plurinuclear, polynuclear, polynucleate.
multinucleosis
SYN: polynucleosis.
Multipara
A woman who has had 2 or more pregnancies resulting in potentially viable offspring. A woman who is "para III" has had 3 such pregnancies. A woman who is "para ...
multiparity
Condition of being a multipara.
Multiparous
1) Having two or more offspring at one birth. 2) Related to a multipara. See also uniparous. * * * Relating to a multipara.
multipartial
Polyvalent, with respect to an antiserum.
multiple
Manifold; repeated several times; occurring in several parts at the same time, as m. arthritis, m. neuritis. [L. multiplex, fr. multus, many, + plico, pp. -atus, to fold]
Multiple myeloma
A malignancy of plasma cells (a form of lymphocyte) that typically involves multiple sites within the bone morrow and secretes all
Multiple sclerosis (MS)
The National Multiple Sclerosis Society says of MS that it is "a disease that randomly attacks your central nervous system, wearing away the control you have over your body. ...
Multiple symmetric lipomatosis
A disorder characterized by painless symmetrical diffuse deposits of fat beneath the skin of the neck, upper trunk, arms and legs. The condition is thought to be genetic although ...
multipolar
Having more than two poles; denoting a nerve cell in which the branches project from several points.
multirooted
Having more than two roots.
multirotation
SYN: mutarotation.
multisubstrate
Referring to an enzyme, receptor, or acceptor protein, which requires two or more substrates.
Munchausen syndrome
(This is an alternate entry to Munchhausen syndrome with two h's in Munchhausen. Whole medical reports have been written about the Munchausen syndrome incorrectly written with ...
Münchausen syndrome
(This is an alternate entry to Munchhausen syndrome. Münchhausen has an umlaut over the u but it is sometimes written as "Munchhausen" without the umlaut in English.) A ...
Münchhausen
Baron Karl F.H. von, German nobleman, soldier, and raconteur, 1720–1797. See Munchausen syndrome, Munchausen syndrome by proxy.
Munchhausen by proxy
A form or Munchhausen syndrome in which a parent feigns illness in a child. In some cases the parent is simply over-anxious or poorly informed. In others, a misdirected desire ...
Munchhausen syndrome
Recurrent feigning of catastrophic illnesses. Munchhausen syndrome is a psychological disorder that is characterized by the recurrent presentation of the patient for treatment of ...
Munro
William J., Australian dermatologist, 1863–1908. See M. abscess, M. microabscess. John C., U.S. surgeon, 1858–1910. See M. point.
Munsell
Albert H., U.S. artist, 1858–1918. See Farnsworth-M. color test. Hazel E., U.S. chemist, *1891. See Sherman-M. unit.
Munson
Edward Sterling, U.S. ophthalmologist, *1933. See M. sign.
Münzer
Egmont, Austrian physician, 1865–1924. See tract of M. and Wiener.
Mur
Abbreviation for muramic acid.
mural
Relating to the wall of any cavity. [L. muralis; fr. murus, wall]
muramic acid
2-Amino-3-O-(1-carboxyethyl)-2-deoxy-d-glucose; d-glucosamine and lactate in ether linkage between the 3 and 2 positions, respectively; a constituent of the mureins in bacterial ...
muramidase
SYN: lysozyme.
mureins
Peptidoglycans composing the sacculus or cell casing of bacteria, consisting of linear polysaccharides of alternating N-acetyl-d-glucosamine and N-acetylmuramic acid units, to ...
Muret
Paul-Louis, French physician, *1878. See Quénu-M. sign.
murexide
The ammonium salt of purpuric acid, formerly used as a dye but superseded by the aniline colors.
muriate
Former term for chloride. [L. muria, brine]
muriatic
Relating to brine. [L. muriaticus, pickled in brine, fr. muria, brine]
muriatic acid
SYN: hydrochloric acid.
Muridae
The largest family of Rodentia and of mammals, embracing the Old World mice and rats. [L. mus (mur-), a mouse]
muriform
Multicellular with cross and longitudinal septa; denoting an aggregation of cells fitting together like stones in a stone wall. [L. murus, wall, + -form]
murine
Relating to animals of the family Muridae. [L. murinus, relating to mice, fr. mus (mur-), a mouse]
Murine typhus
An acute infectious disease with fever, headache, and rash, all quite similar to, but milder than, epidemic typhus, caused by a related microorganism, Rickettsia typhi (mooseri), ...
Murmur
A Murmur is an abnormal "whooshing" sound created by blood flow through heart valves, as well as flow through chamber narrowings or unusual connections seen with ...
muromonab-CD3
A murine monoclonal antibody to the T3 (CD3) antigen of human T lymphocytes, used as an immunosuppressant in the treatment of acute allograft rejection following renal ...
Murphy
John B., U.S. surgeon, 1857–1916. See M. drip, M. button, M. percussion.
Mus
A genus of the family Muridae that includes about 16 species of mice; domesticated strains are numerous and genetically well defined, the most popular being the albino and ...
Mus musculus genome
All of the genetic information contained in Mus musculus, the laboratory mouse. The genomes of particular nonhuman organisms such as the mouse have been studied for a number of ...
Musca
A genus of flies (family Muscidae, order Diptera) that includes the common housefly, M. domestica, a species universally associated with humans, particularly under unsanitary ...
muscae volitantes
Floaters; appearance of moving spots before the eyes, arising from remnants of the embryologic hyaloid vascular system in the vitreous humor. [L. pl. of musca, fly; pres. ppl. ...
muscarine
A toxin with neurologic effects, first isolated from Amanita muscaria (fly agaric) and also present in some species of Hebeloma and Inocybe. The quaternary trimethylammonium ...
muscarinic
1. Having a muscarinelike action, i.e., producing effects that resemble postganglionic parasympathetic stimulation. 2. An agent that stimulates the postganglionic ...
muscarinism
SYN: mycetism.
Musci
The class of plants that includes the mosses. [L. pl. of muscus, moss]
muscicide
An agent destructive to flies. [L. musca, fly, + caedo, to kill]
Muscidae
The family of flies (order Diptera) that includes the houseflies ( Musca) and stable flies (Stomoxys). [L. musca, fly]
muscimol
An alkaloid extracted from the poison mushroom Amanita muscaria; selectively stimulates receptors for γ-aminobutyric acid ( GABA) and is used as a molecular probe to study ...
Muscle
Muscle is the tissue of the body which primarily functions as a source of power. There are three types of muscle in the body. Muscle which is responsible for moving extremities ...
Muscle, abductor
Any muscle used to pull a body part away from the midline of the body. For example, the abductor muscles of the legs spread the legs away from the midline and away from one ...
Muscle, adductor
Any muscle that pulls a body part toward the midline of the body. For example, the adductor muscles of the legs pull the legs toward the midline of the body so the legs are ...
Muscle, central core disease of (CCD)
One of the conditions that produces ‘floppy baby’ syndrome. CCD causes hypotonia (inadequately toned muscles characterized by floppiness) in the newborn baby, slowly ...
Muscle, ciliary
One of the muscles that relax the zonules to enable the lens to change shape for focusing. The zonules are fibers that hold the lens suspended in position and enable it to change ...
Muscle, infraspinatus
A muscle that assists the lifting of the arm while turning the arm outward (external rotation). The tendon of the infraspinatus muscle is one of four tendons that stabilize the ...
Muscle, papillary
Small muscles within the heart that anchor the heart valves. The anchor ropes are the chordae tendineae, thread-like bands of fibrous tissue that attach on one end to the edges ...
Muscle, piriformis
A muscle that begins at the front surface of the sacrum (the V-shaped bone between the buttocks at the base of the spine) and passes through the greater sciatic notch to attach ...
Muscle, psoas
Muscles of the lower back (the loin). There are two psoas muscles on each side of the back. The larger of the two is called the psoas major and the smaller the psoas minor. ...
Muscle, subscapularis
A muscle that moves the arm by turning it inward (internal rotation). The tendon of the subscapularis muscle is one of four tendons that stabilize the shoulder joint and ...
Muscle, supraspinatus
A muscle that is responsible for elevating the arm and moving it away from the body. The tendon of the supraspinatus muscle is one of four tendons that stabilize the shoulder ...
Muscle, teres minor
A muscle that assists the lifting of the arm during outward turning (external rotation) of the arm. The tendon of the teres minor muscle is one of four tendons that stabilize the ...
muscle-bound
Denoting a condition in which individual muscles are overdeveloped but dyssynergic in concerted action.
muscle-trimming
SYN: border molding.
Muscles, abdominal
A large group of muscles in the front of the abdomen that assists in the regular breathing movement and supports the muscles of the spine while lifting and keeping abdominal ...
muscone
Muskone.
musculamine
SYN: spermine.
Muscular
Having to do with the muscles. Also, endowed with above average muscle development. Muscular system refers to all of the muscles of the body collectively. * * * 1. Relating to a ...
Muscular atrophy, post-polio (PPMA)
Late muscle wasting that occurs as part of the post-polio syndrome (PPS), a constellation of symptoms and signs that appear belatedly, from 20 to 40 years, after the initial ...
Muscular dystrophy, Becker
A form of muscular dystrophy that is quite similar to Duchenne muscular dystrophy, except that patients with Becker do produce some of the key protein, dystrophin, whereas ...
Muscular dystrophy, congenital
A form of muscular dystrophy that is present at birth. Various types of congenital MD have been identified, each caused by a different genetic error. Congenital MD can affect ...
Muscular dystrophy, distal
One of several rare, genetic muscle diseases characterized by wasting of those muscles furthest from the midline, such as the hands and feet. Distal MD begins in adulthood, and ...
Muscular dystrophy, Emory-Dreifuss
A rare form of muscular dystrophy that begins in childhood or the teen years. It is a slowly progressing disorder that begins in the upper arms or upper legs. Contractures of the ...
Muscular dystrophy, facioscapulohumeral
A form of muscular dystrophy that begins before age 20 with slowly progressive weakness of the muscles of the face, shoulders, and feet. The severity of the disease is variable. ...
Muscular dystrophy, limb-girdle
A form of muscular dystrophy that begins in the patient’s teens or twenties, starting with progressive weakness in the hips or shoulders. A wheelchair is usually needed within ...
Muscular dystrophy, myotonic
Myotonic dystrophy, an inherited disease in which the muscles contract but have decreasing power to relax — this phenomenon is termed myotonia (irritability and prolonged ...
Muscular dystrophy, oculopharyngeal
A form of muscular dystrophy that begins in the muscles of the eyes and throat. It usually appears between the ages of 40 and 60, and progresses slowly. It is caused by an error ...
Muscular dystrophy, Ullrich congenital
A disorder evident at birth characterized by muscle weakness, contractures of multiple joints, and hyperextensibility (looseness) of joints, particularly distal joints (well away ...
muscularis
The muscular coat of a hollow organ or tubular structure. [Mod. L. muscular] - m. mucosae the thin layer of smooth muscle found in most parts of the digestive tube located outside ...
muscularity
The state or condition of having well developed muscles.
musculature
The arrangement of the muscles in a part or in the body as a whole.
musculoaponeurotic
Relating to muscular tissue and an aponeurosis of origin or insertion.
musculocutaneous
Relating to both muscle and skin. SYN: myocutaneous, myodermal.
musculomembranous
Relating to both muscular tissue and membrane; denoting certain muscles, such as the occipitofrontalis, that are largely membranous.
musculophrenic
Relating to the muscular portion of the diaphragm; denoting an artery supplying this part.
musculoskeletal
Relating to muscles and to the skeleton, as, for example, the m. system.
Musculoskeletal and Skin Diseases, National Institute of Arthritis and (NIAMS)
One of the National Institutes of Health in the U.S. As its somewhat cumbersome name indicates, NIAMS’s mission is a broad and important one, namely to “conduct and support a ...
musculospiral
Denoting the m. nerve. See radial nerve.
musculotendinous
Relating to both muscular and tendinous tissues.
musculotropic
Affecting, acting upon, or attracted to muscular tissue.
mushbite
A maxillomandibular record made by introducing a mass of soft wax into the patient's mouth and instructing the patient to bite into it to the desired degree; not a generally ...
musicotherapy
An adjunctive treatment of mental disorders by means of music.
Musset
L.C. Alfred de, French poet, 1810–1857; person in whom M. sign was studied. See M. sign.
mussitation
Movements of the lips as if speaking, but without sound; observed in delirium, semicoma, and severe Parkinson disease. [L. mussito, to murmur constantly, fr. musso, pp. -atus, ...
Mussy
See Guéneau de M..
must
Unfermented juice of the grape or other fruits. [L. mustum, new wine, ntr. of mustus, fresh]
Mustard
William T., Canadian thoracic surgeon, 1914–1987. See M. operation, M. procedure.
mustard
1. The dried ripe seeds of Brassica alba (white m.) and B. nigra (black m.) (family Cruciferae). 2. SYN: m. gas. [O.Fr. moustarde, fr. L. mustum, must] - black m. the dried ...
Mustard (Arabidopsis thaliana) genome
All of the genetic information contained in Arabidopsis thaliana, a plant belonging to the mustard family. The genomes of particular nonhuman organisms such as Arabidopsis ...
mustard oil
Term applied to any of the organic isothiocyanates in general, but more specifically to allyl isothiocyanate; such oils are metabolically convertible to thiocyanates and may ...
mustine hydrochloride
SYN: mechlorethamine hydrochloride.
mutacism
SYN: mytacism.
Mutagen
Something capable of causing a gene-change. Among the known mutagens are radiation, certain chemicals and some viruses. * * * Any agent that promotes a mutation or causes an ...
mutagenesis
1. Production of a mutation. 2. Production of genetic alteration through use of chemicals or radiation. - cassette m. the production of mutants within a region (often bounded by ...
mutagenic
Promoting mutation.
mutant
1. A phenotype in which a mutation is manifested. 2. A gene that is rare and usually harmful, in contrast to a wild-type gene, not necessarily generated recently. - active m. a ...
mutarotase
SYN: aldose 1-epimerase.
mutarotation
The process of changing specific rotation at a given wavelength; e.g., a solution of α-d-glucose recrystallized from its solution in acetic acid and freshly dissolved in water ...
mutase
Any enzyme that catalyzes the apparent migration of groups within one molecule, e.g., phosphoglycerate phosphomutase; sometimes the transfer is from one molecule to another, ...
Mutation
A permanent change, a structural alteration, in the DNA or RNA. In humans and many other organisms, mutations occur in DNA. However, in retroviruses like HIV, mutations occur in ...
Mutation, acquired
A change in a gene or chromosome that occurs in a single cell after the conception of the individual. That change is then transmitted to all cells descended from that cell, ...
Mutation, germline
A heritable change in the DNA that occurred in a germ cell (a cell destined to become an egg or in the sperm) or the zygote (the conceptus) at the single-cell stage. When ...
Mutation, hereditary
A heritable change in the DNA of a gene or chromosome in a cell destined to become an egg or a sperm or the zygote (the conceptus) at the single-cell stage. When transmitted to ...
Mutation, missense
A genetic change involving the substitution of one base in the DNA for another which results in the substitution of one amino acid in a polypeptide for another. A missense ...
Mutation, nonsense
A mutation (a change) in a base in the DNA that prematurely stops the translation (reading) of messenger RNA (mRNA) resulting in a polypeptide chain that ends prematurely and a ...
Mutation, null
A mutation (a change) in a gene that leads to its not being transcribed into RNA and/or translated into a functional protein product. For example, a null mutation in a gene that ...
Mutation, point
A single nucleotide base change in the DNA. A point mutation may consist of the loss of a nucleotide, the insertion of an additional nucleotide, or the substitution of one ...
Mutation, private
A rare mutation found usually only in a single family or a small population. (It is like a privately printed book.)
Mutation, somatic
A change in a gene or chromosome that occurs in a general body cell, as opposed to a germ cell, and so cannot be transmitted to children. A somatic mutation occurs in a single ...
Mute
A mute is a person who does not speak, either from an inability to speak or an unwillingness to speak. The term "mute" is specifically applied to a person who, due to profound ...
mutein
A term used for a protein arising as a result of a mutation. [mutation + protein]
mutilation
Disfigurement or injury by removal or destruction of any conspicuous or essential part of the body. [L. mutilatio, fr. mutilo, pp. -atus, to maim]
Mutism
The inability or unwillingness to speak. A person who is mute cannot or does not care to talk. Someone who was mute was said to be dumb, not in the sense of being stupid, but in ...
Mutism, akinetic
A state in which a person is unspeaking (mute) and unmoving (akinetic). A textbook on clinical neurology observes that a person with akinetic mutism has "sleep-waking cycles ...
Mutism, elective
Complete lack of speech (mutism) that is believed to be volitional (willed) on the part of the patient. True elective mutism may be a reaction to a traumatic event, the ...
muton
In genetics, the smallest unit of a chromosome in which alteration can be effective in causing a mutation (a single nucleotide change). [mutation + -on]
mutualism
Symbiotic relationship in which both species derive benefit. Cf.:commensalism, metabiosis, parasitism.
mutualist
SYN: symbion. [L. mutuus, in return, mutual]
Mv
Obsolete abbreviation for mendelevium.
mV
Abbreviation for millivolt.
MVV
Abbreviation for maximum voluntary ventilation.
MW
Abbreviation for molecular weight.
Myalgia
Pain in a muscle; or pain in multiple muscles. Myalgia is muscle pain. That's all. There are, however, specific types of myalgia such as, for examples, epidemic myalgia and ...
Myalgia, epidemic
Also known as Bornholm disease, this is a temporary illness that is a result of virus infection. The disease features fever and intense abdominal and chest pains with headache. ...
myasthenia
Muscular weakness. [G. mys, muscle, + astheneia, weakness] - m. angiosclerotica SYN: intermittent claudication. - m. gravis a disorder of neuromuscular transmission marked by ...
Myasthenia gravis (MG)
An autoimmune neuromuscular disorder characterized by fatigue and exhaustion of muscles. It is caused by a mistaken immune response to the nicotinic acetylcholine receptors ...
myasthenic
Relating to myasthenia.
myatonia, myatony
Abnormal extensibility of a muscle. [G. mys, muscle, + a priv. + tonos, tone] - m. congenita SYN: amyotonia congenita.
myatrophy
SYN: muscular atrophy.
mycelia
Plural of mycelium.
mycelian
Pertaining to a mycelium.
mycelioid
Resembling a mycelium. [ mycelium + G. eidos, resemblance]
mycelium
The mass of hyphae making up a colony of fungi. [G. mykes, fungus, + helos, nail, wart, excrescence on animal or plant] - aerial m. the portion of m. that grows upward or ...
mycet-, myceto-
Fungus. SEE ALSO: myco-. [G. mykes, fungus]
mycete
A fungus. [G. mykes, fungus]
mycetism, mycetismus
Poisoning by certain species of mushrooms. SYN: muscarinism. [G. mykes, fungus] - m. cerebralis a condition characterized by transient hallucinogenic symptoms following ingestion ...
mycetogenetic, mycetogenic
Caused by fungi. SYN: mycetogenous. [G. mykes, fungus, + gennetos, begotten]
mycetogenous
SYN: mycetogenetic.
mycetoma
A chronic infection involving the subcutaneous tissue, skin, and contiguous bone; characterized by the formation of localized lesions with tumefactions and multiple draining ...
myco-
Fungus. SEE ALSO: mycet-. [G. mykes, fungus]
mycobacteria
Organisms belonging to the genus Mycobacterium. - atypical m. species of m. other than M. tuberculosis or M. bovis that can cause disease in immunocompromised humans; being ...
Mycobacteriaceae
A family of aerobic bacteria (order Actinomycetales) containing Gram-positive, spherical to rod-shaped cells. Branching does not occur under ordinary cultural conditions. They ...
mycobacteriosis
Infection with mycobacteria.
Mycobacterium
A genus of aerobic, nonmotile bacteria (family Mycobacteriaceae) containing Gram-positive, acid-fast, slender, straight or slightly curved rods; slender filaments occasionally ...
Mycobacterium avium complex (MAC)
MAC is a serious opportunistic infection caused by two similar bacteria (Mycobacterium avium and Mycobacterium intercellulare) found in the soil and dust particles. In AIDS, MAC ...
mycobactin
A complex lipid factor reported to be required for the growth of Mycobacterium tuberculosis in human plasma; appears to be identical with the lipid factor extracted from M. phlei ...
mycocide
SYN: fungicide. [ myco- + L. caedo, to kill]
mycodermatitis
An obsolete term to designate an eruption of mycotic (fungus, yeast, mold) origin.
mycogastritis
Inflammation of the stomach due to the presence of a fungus. [ myco- + G. gaster, stomach, + -itis, inflammation]
mycolic acids
Long-chain cyclopropanecarboxylic acids (C19–C21), further substituted by long-chain (C24–C30) alkanes containing free hydroxyl groups, found in certain bacteria; these waxy ...
mycologist
A person specializing in mycology.
mycology
The study of fungi : their classification, edibility, cultivation, and biology. [ myco- + G. logos, study] - medical m. the study of fungi that produce disease in humans and ...
mycophage
A virus, the host of which is a fungus, in contradistinction to a bacteriophage, the host of which is a bacterium. SEE ALSO: mycovirus. [ myco- + G. phago, to eat]
Mycoplasma
The mycoplasma are a very large group of bacteria. There are more than 70 types. Mycoplasma hominis and Mycoplasma pneumoniae are among the dozen types of mycoplasma that occur in ...
Mycoplasmatales
An order of Gram-negative bacteria containing cells which are bounded by a three-layered membrane but which do not possess a true cell wall. The minimal reproductive units are 0.2 ...
mycopus
SYN: mucopus.
mycose
SYN: trehalose.
mycosis
Any disease caused by a fungus ( filamentous or yeast). [ myco- + G. -osis, condition] - m. framboesioides SYN: yaws. - m. fungoides a chronic progressive lymphoma arising in ...
Mycosis fungoides
: A type of non-Hodgkin's lymphoma that first appears on the skin. Also called cutaneous T-cell lymphoma.
mycostatic
SYN: fungistatic.
mycosterols
Sterols obtained from fungi.
mycotic
Relating to or caused by a fungus.
mycotoxicosis
Poisoning due to the ingestion of preformed substances produced by the action of certain fungi on particular foodstuffs or ingestion of the fungi themselves; e.g., ergotism. [ ...
mycotoxin
Toxic compound produced by certain fungi; some are used for medicinal purposes; e.g., muscarine, psilocybin.
mycovirus
A virus that infects fungi.
mydaleine
A poisonous ptomaine formed in putrefying liver and other viscera; it acts specifically upon the heart, causing arrest of its action in diastole. [G. mydaleos, moldy, fr. mydos, ...
mydatoxin
A ptomaine from putrefying viscera and flesh. [G. mydos, dampness, decay, + toxikon, poison]
Mydriasis
Dilation of the pupils induced by eyedrops. The opposite of miosis. * * * Dilation of the pupil. [G.] - alternating m. m. alternately affecting each eye. - amaurotic m. a ...
mydriatic
1. Causing mydriasis or dilation of the pupil. 2. An agent that dilates the pupil.
myectomy
Excision of a portion of a muscle. [G. mys, muscle, + ektome, excision]
myectopy, myectopia
Rarely used term for dislocation of a muscle. [G. mys, muscle, + ektopos, out of place]
myel-, myelo-
1. The bone marrow. 2. The spinal cord and medulla oblongata. Cf.:medullo-. 3. The myelin sheath of nerve fibers. [G. myelos, medulla, marrow]
myelapoplexy
SYN: hematomyelia. [myel- + G. apoplexia, apoplexy]
myelatelia
Developmental defect of the spinal cord. [myel- + G. ateleia, incompleteness]
myelauxe
Hypertrophy of the spinal cord. [myel- + G. auxe, increase]
myelemia
Rarely used term for myelocytosis. [myel- + G. haima, blood]
myelencephalon
SYN: medulla oblongata. [myel- + G. enkephalos, brain]
myelic
Relating to (1) the spinal cord, or (2) bone marrow.
Myelin
The fatty substance that covers and protects nerves. Myelin is a layered tissue surrounding the axons or nerve fibers. The sheath around the nerve fibers which acts electrically ...
myelinated
Having a myelin sheath. SYN: medullated (2).
myelination
The acquisition, development, or formation of a myelin sheath around a nerve fiber. SYN: medullation (2), myelinization, myelinogenesis.
myelinic
Relating to myelin.
myelinization
SYN: myelination.
myelinoclasis
Destruction of myelin. SEE ALSO: demyelination, dysmyelination. [myelin + G. klasis, a breaking]
myelinogenesis
SYN: myelination. [myelin + G. genesis, production]
myelinolysis
Dissolution of the myelin sheaths of nerve fibers. [myelin + G. lysis, dissolution] - central pontine m. localized loss of myelin within the midbase of the pons; related to ...
myelinopathy
A disorder affecting the myelin of peripheral nerve fibers, in contrast to one affecting axons (axonopathy).
myelitic
Relating to or affected by myelitis.
myelitis
1. Inflammation of the spinal cord. 2. Inflammation of the bone marrow. [myel- + G. -itis, inflammation] - acute necrotizing m. a spinal cord disorder, probably a demyelinating ...
myelo-
See myel-.
myeloarchitectonics
The pattern of myelinated nerve fibers in the brain, as distinguished from cytoarchitectonics.
myeloblast
An immature cell (10 to 18 μm in diameter) in the granulocytic series, occurring normally in bone marrow, but not in the circulating blood (except in certain diseases). When ...
myeloblastemia
The presence of myeloblasts in the circulating blood. [ myeloblast + G. haima, blood]
myeloblastoma
A nodular focus or fairly well-circumscribed accumulation of myeloblasts, as sometimes observed in acute myeloblastic leukemia and chlorosis. [ myeloblast + G. -oma, tumor]
myeloblastosis
The presence of unusually large numbers of myeloblasts in the circulating blood, or tissues, or both (as in acute leukemia).
myelocele
1. Protrusion of the spinal cord in spina bifida. [ myelo- + G. kele, hernia] 2. The central canal of the spinal cord. [G. myelos, marrow, + koilia, a hollow]
myelocyst
Any cyst (usually lined with columnar or cuboidal cells) that develops from a rudimentary central canal in the central nervous system. [ myelo- + G. kystis, bladder]
myelocystic
Pertaining to or characterized by the presence of a myelocyst.
myelocystocele
Spina bifida containing spinal cord substance. [ myelo- + G. kystis, bladder, + kele, tumor]
myelocystomeningocele
SYN: meningomyelocele. [ myelo- + G. kystis, bladder, + meninx (mening-), membrane, + kele, hernia]
myelocyte
1. A young cell of the granulocytic series, occurring normally in bone marrow, but not in circulating blood (except in certain diseases). When stained with the usual dyes, the ...
myelocythemia
The presence of myelocytes in the circulating blood, especially in persistently large numbers (as in myelocytic leukemia). [ myelocyte + G. haima, blood]
myelocytic
Pertaining to or characterized by myelocytes.
myelocytoma
A nodular focus or fairly well-circumscribed, relatively dense accumulation of myelocytes, as in certain tissues of persons with myelocytic leukemia. [ myelocyte + G. -oma, ...
myelocytomatosis
A form of tumor involving chiefly the myelocytes.
myelocytosis
The occurrence of abnormally large numbers of myelocytes in the circulating blood, or tissues, or both. [ myelocyte + G. -osis, condition]
myelodiastasis
Softening and destruction of the spinal cord. [ myelo- + G. diastasis, separation]
myelodysplasia
1. An abnormality in development of the spinal cord, especially the lower part of the cord. 2. Inappropriate term for spina bifida occulta. [ myelo- + G. dys-, difficult, + ...
Myelodysplastic syndrome
: One of a group of disorders of the bone marrow which have in common abnormalities in cell development of one or more of the cells lines normally found in the bone marrow. ...
Myeloencephalitis
Inflammation of both the spinal cord and the brain. Myeloencephalitis (also called encephalomyelitis) can be caused by a variety of conditions that lead to inflammation of the ...
Myelofibrosis
Fibrosis (spontaneous scarring) of the bone marrow. This can be associated with a variety of diseases, primarily myeloproliferative (pre-leukemic) disorders. Sometimes used ...
myelogenesis
1. Development of bone marrow. 2. Development of the central nervous system. 3. Formation of myelin around an axon.
myelogenetic, myelogenic
1. Relating to myelogenesis. 2. Produced by or originating in the bone marrow. SYN: myelogenous.
Myelogenous
: Referring to the nonlymphocytic groups of white blood cells, including the granulocytes, monocytes and platelets. Synonymous with myeloid. Acute myelogenous leukemia is ...
Myelogenous leukemia, acute
Abbreviated AML. Also called acute myeloid leukemia or acute nonlymphocytic leukemia (ANLL). A quickly progressive malignant disease in which there are too many immature ...
myelogone, myelogonium
An immature white blood cell of the myeloid series that is characterized by a relatively large, fairly deeply stained, finely reticulated nucleus that contains palely stained ...
Myelogram
: An x-ray of the spinal cord and the bones of the spine. During a myelogram, a contrast material that is injected into the spinal canal is used to visualize the structures of ...
myelography
Radiography of the spinal cord and nerve roots after the injection of a contrast medium into the spinal subarachnoid space. [ myelo- + G. graphe, a drawing]
myeloic
Pertaining to the tissue and precursor cells from which neutrophils, eosinophils, and basophils are derived.
Myeloid
: Referring to the nonlymphocytic groups of white blood cells, including the granulocytes, monocytes and platelets. Synonymous with myelogenous. Acute myeloid leukemia is thus ...
Myeloid leukemia, acute
A quickly progressive malignant disease in which there are too many immature blood-forming cells in the blood and bone marrow, the cells being specifically those destined to give ...
myeloidosis
General hyperplasia of myeloid tissue.
myelokathexis
SYN: kathexis.
myeloleukemia
A form of leukemia in which the abnormal cells are derived from myelopoietic tissue.
myelolipoma
Nodular accumulations of cells derived from localized proliferation of reticuloendothelial tissue in the blood sinuses of the adrenal glands; grossly, the nodules may seem to be ...
myelolymphocyte
Obsolete term for an abnormal form of the lymphocytic series in the bone marrow, and presumed to be formed in that tissue.
myelolysis
Decomposition of myelin.
Myeloma
A tumor of antibody-producing cells, called plasma cells, that are normally found in the bone marrow. * * * 1. A tumor composed of cells derived from hemopoietic tissues of the ...
myelomalacia
Softening of the spinal cord. [ myelo- + G. malakia, a softness] - angiodysgenetic m. SYN: subacute necrotizing myelitis.
myelomatosis
A disease characterized by the occurrence of myeloma in various sites. - multiple m., m. multiplex SYN: multiple myeloma.
myelomeningocele
SYN: meningomyelocele. [ myelo- + G. meninx, membrane, + kele, hernia]
myelomere
Neuromere of the brain or spinal cord. [ myelo- + G. meros, part]
myelomonocyte
A leukocyte that appears to resemble both myelocytes and monocytes in that nuclear chromatin is less condensed than in the myelocyte and the cytoplasm has few neutrophilic ...
myeloneuritis
SYN: neuromyelitis.
myelonic
Relating to the spinal cord. [G. myelon, fr. myelos, marrow]
myeloparalysis
SYN: spinal paralysis.
myelopathic
Relating to myelopathy.
myelopathy
1. Disorder of the spinal cord. 2. A disease of the myelopoietic tissues. [ myelo- + G. pathos, suffering] - carcinomatous m. degeneration or necrosis of the spinal cord ...
myeloperoxidase
A peroxidase occurring in phagocytic cells that can oxidize halogen ions ( e.g., I−) to the free halogen; an autosomal recessive deficiency of m. leads to impaired bacterial ...

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