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Price-Jones
Cecil, English hematologist, 1863–1943. See Price- Jones curve.
Priestley
John Gillies, British physiologist, 1880–1941. See Haldane-P. sample.
prilocaine hydrochloride
A local anesthetic of the amide type, related chemically and pharmacologically to lidocaine hydrochloride; used for peridural, caudal, and nerve blocks, and for regional and ...
primacy
The state of being primary, or foremost in rank or importance. [see primary] - genital p. in psychoanalysis, the primary characteristic of the genital phase of psychosexual ...
primal
1. First or primary. 2. SYN: primordial (2).
primaquine phosphate
An antimalarial agent especially effective against Plasmodium vivax, terminating relapsing vivax malaria; usually administered with chloroquine. - p. sensitivity a ...
Primary
First or foremost in time or development. The primary teeth (the baby teeth) are those that come first. Primary may also refer to symptoms or a disease to which others are ...
Primary amenorrhea
Absence of menstruation. Amenorrhea is conventionally divided into primary and secondary amenorrhea. With primary amenorrhea, menstruation never takes place. It fails to ...
Primary amyloidosis
A disorder of plasma cells (special white blood cells that produce antibodies), this is one of a group of diseases (called amyloidosis) in which protein deposits (amyloid) ...
Primary biliary cirrhosis (PBC)
A liver disease caused by an abnormality of the immune system. Small bile ducts within the liver become inflamed and obliterated. Backup of bile causes intense skin itching and ...
Primary care
The "medical home" for a patient, ideally providing continuity and integration of health care. All family physicians and most pediatricians and internists are in ...
Primary care provider
In insurance parlance, a physician chosen by or assigned to a patient, who both provides primary care and acts as a gatekeeper to control access to other medical services.
Primary ciliary dyskinesia
The immotile cilia syndrome, a condition in which poorly functioning cilia (hairlike projections from cells) in the respiratory tract contribute to retention of secretions and ...
Primary dentition
The set of 20 first (deciduous) teeth. The primary dentition is as opposed to the secondary (permanent) dentition. At birth, both sets of dentition are evident by X-ray.
Primary liver cancer, adult
A tumor in which the cancer starts during adulthood in cells in the liver. Also called hepatocellular carcinoma. Primary liver cancer is different from cancer that has ...
primary reninism
Overproduction of renin by juxtaglomerular cells in the absence of a stimulus (such as decreased renal perfusion); leads to hyperaldosteronism, hypertension, hypokalemia, and ...
Primary sclerosing cholangitis
1. A chronic disorder of the liver in which the ducts carrying bile from the liver to the intestine, and often the ducts carrying bile within the liver, become inflamed, ...
Primary teeth
The first teeth which are shed and replaced by permanent teeth. The first primary tooth comes in (erupts) at about 6 months of age and the 20th and last one erupts at around 2 1/2 ...
primase
A polymerase that acts on a template DNA strand to produce RNA, resulting in the formation of an RNA primer needed in RNA replication. SYN: dnaG. [primer + -ase]
primate
An individual of the order Primates. [L. primus, first]
Primates
The highest order of mammals, including humans, monkeys, and lemurs. [L. primus, first]
primer
1. A molecule (which may be a small polymer) that initiates the synthesis of a larger structure. SYN: starter. 2. A pheromone that causes a long-term physiologic change.
primerite
SYN: protomerite. [L. primus, first, + G. meros, part]
primidone
An anticonvulsant drug used in the management of generalized tonic clonic and complex partial epilepsy.
primigravida
See gravida. [L. fr. primus, first, + gravida, a pregnant woman] - elderly p. dated term referring to a woman older than 35 years who is pregnant for the first time.
primipara
See para. [L. fr. primus, first, + pario, to bring forth]
primiparity
Condition of being a primipara.
primiparous
Denoting a primipara.
primite
The anterior member of a pair of gregarine gamonts in syzygy.
primitive
SYN: primordial (2). [L. primitivus, fr. primus, first]
Primitive neuroectodermal tumors
: A type of brain tumor believed to originate in neural crest cells. Diagnosis is by biopsy. Treatment is by radiation and/or chemotherapy. Abbreviated PNET. See also Ewing’s ...
primordia
Plural of primordium.
primordial
1. Relating to a primordium. 2. Relating to a structure in its first or earliest stage of development. SYN: primal (2), primitive.
primordium
An aggregation of cells in the embryo indicating the first trace of an organ or structure. SYN: anlage (1). [L. origin, fr. primus, first, + ordior, to begin] - genital p. ...
primosome
A complex of proteins that bind with primase at specific sequences of DNA that serve as the sites for the formation of RNA primers; a part of the replisome. [primer + -some]
primula
The rhizome and roots of a number of species of P. (family Primulaceae), primrose or cowslip; has been used as expectorant, diuretic, and anthelmintic. In some sensitive persons ...
primulin
An acid yellow thiazole dye used as a fluorescent vital stain.
Primum non nocere
The Latin words for medical slogan “First do no harm,” a fundamental medical precept of Hippocrates (ca. 460-ca.377 B.C.).
primus
First; denoting the first of a series of similar structures. [L.]
princeps
Principal; in anatomy, term used to distinguish the largest and most important of several arteries. [L. chief, fr. primus, first, + capio, to take, choose] - p. cervicis SYN: ...
Princeteau
L.R., French physician, *1884. See P. tubercle.
Principal joints of the body
The principal joints of the human body include the following: Acromioclavicular Ankle (tibia-fibula and talus) Atlas and axis Atlas and occipital Calcaneocuboid ...
principle
1. A general or fundamental doctrine or tenet. SEE ALSO: law, rule, theorem. 2. The essential ingredient in a substance, especially one that gives it its distinctive quality or ...
Pringle
John J., English dermatologist, 1855–1922. See P. disease, Bourneville-P. disease.
Prinzmetal
Myron, U.S. cardiologist, 1908–1994. See P. angina.
Prinzmetal angina
Chest pain due to coronary artery spasm, a sudden constriction of a coronary artery (one of the vessels that supply the heart muscle with blood rich in oxygen) depriving the ...
prion
Small, infectious proteinaceous particle, of nonnucleic acid composition because of its resistance to nucleases; the causative agent, either on a sporadic, genetic, or ...
Prions
A newly discovered type of disease-causing agent, neither bacterial nor fungal nor viral, and containing no genetic material. A prion is a protein that occurs normally in a ...
prism
A transparent solid, with sides that converge at an angle, that deflects a ray of light toward the thickest portion (the base) and splits white light into its component colors; in ...
prisma
A structure resembling a prism. [G. something sawed, a prism] - prismata adamantina the calcified, microscopic rods radiating from the surface of the dentin, forming the ...
prismatic
Relating to or resembling a prism.
privacy
1. Being apart from others; seclusion; secrecy. 2. Especially in psychiatry and clinical psychology, respect for the confidential nature of the therapist-patient relationship.
Private mutation
A rare mutation found usually only in a single family or a small population. It is like a privately printed book.
PRK
Acronym for photorefractive keratectomy.
PRK (photorefractive keratectomy)
A kind of laser eye surgery designed to change the shape of the cornea to eliminate (or reduce) the need for glasses and contact lenses. The laser is used to remove the outer ...
PRL
Abbreviation for prolactin.
Pro
Symbol for proline or prolyl.
pro rat. aet.
Abbreviation for L. pro ratione aetatis, according to (patient's) age.
pro re nata
As the occasion arises; as necessary. [L.]
Pro time
The pro time (or, more properly, the prothrombin time) is a test of the integrity of part of the clotting scheme. The prothrombin time is also commonly used as a method of ...
pro-
1. Prefix denoting before, forward. SEE ALSO: ante-, pre-. 2. In chemistry, prefix indicating precursor of. SEE ALSO: -gen. [L. and G. pro]
Pro- (prefix)
A combining form (from both Greek and Latin) with many meanings including "before, in front of, preceding, on behalf of, in place of, and the same as." Used as a word, ...
pro-oxidants
Compounds or agents capable of generating toxic oxygen species. Cf.:antioxidant.
proaccelerin
SYN: factor V.
proacrosin
A precursor protein of acrosin.
proacrosomal
Relating to an early stage in the development of the acrosome.
proactinium
SYN: protactinium.
proactivator
A substance that, when chemically split, yields a fragment ( activator) capable of rendering another substance enzymatically active.
proal
Relating to a forward movement.
proamnion
An area of the extraembryonic membranes beneath, and in front of, the developing head of a young embryo that remains without mesoderm for some time.
Probability
The likelihood that something will happen. For example, a probability of less than .05 indicates that the probability of something occurring by chance alone is less than 5 in ...
probacteriophage
The stage of a temperate bacteriophage in which the genome is incorporated in the genetic apparatus of the bacterial host. SYN: prophage. - defective p. defective ...
Proband
The family member through whom a family’s medical history comes to light. For example, a proband might be a baby with Down syndrome. The proband may also be called the index ...
probang
A flexible rod with some soft material at the distal end used injudiciously to try to advance or retrieve foreign bodies from the esophagus; a practice to be condemned as ...
Probe
(1) In surgery, a probe is a slender flexible rod with a blunt end used to explore, for example, an opening to see where it goes. (2) In molecular genetics, a probe is a labeled ...
probenecid
A competitive inhibitor of the secretion of penicillin or p-aminohippurate by kidney tubules; a uricosuric agent used in chronic gouty arthritis.
probilifuscins
See bilirubinoids.
probiosis
An association of two organisms that enhances the life processes of both. Cf.:antibiosis (1), symbiosis, mutualism. [ pro- + G. biosis, life]
Probiotic
A microbe that protects its host and can prevent disease. The most common probiotic today is Lactobacillus acidopholous, found in yogurt, acidopholous milk, and supplements. ...
problem
In the mental health professions, a term often used to denote life problems (the difficulties or challenges of life); sometimes used in preference to the terms mental illness or ...
proboscis
1. A long flexible snout, such as that of a tapir or an elephant. 2. In teratology, a cylindric protuberance of the face that, in cyclopia or ethmocephaly, represents the ...
Probstymayria vivipara
A nematode (family Atractidae) closely related to the true pinworms (family Oxyuridae) and still commonly considered the horse pinworm; it is distributed worldwide and is found ...
probucol
An antihyperlipoproteinemic agent.
procainamide hydrochloride
Differs chemically from procaine by containing the amide group (CONH) instead of the ester group (COO). It depresses the irritability of the cardiac muscle, having a ...
procaine hydrochloride
A local anesthetic for infiltration and spinal anesthesia; previously widely used but now infrequently employed.
procapsid
A protein shell lacking a virus genome.
procarbazine hydrochloride
An antineoplastic agent.
procarboxypeptidase
Inactive precursor of a carboxypeptidase.
procarcinogens
Inactive xenobiotics that are converted to carcinogens in the organism.
Procaryotae
SYN: Prokaryotae. [ pro- + G. karyon, kernel, nut]
procaryote
SYN: prokaryote. [ pro- + G. karyon, kernel, nut]
procaryotic
SYN: prokaryotic.
procatarctic
Rarely used term for denoting the exciting cause of a disease. [G. prokatarktikos, beginning beforehand]
procatarxis
1. SYN: exciting cause. 2. The beginning of a disease under the influence of the exciting cause, a predisposing cause already existing. [G. a beginning beforehand, fr. ...
procedure
Act or conduct of diagnosis, treatment, or operation. SEE ALSO: method, operation, technique. - back table p. p. performed on an organ that has been removed from a patient before ...
Procedure, Whipple
A type of surgery used to treat pancreatic cancer. The head of the pancreas, the duodenum, a portion of the stomach, and other nearby tissues are removed. The Whipple procedure ...
procelia
A lateral ventricle of the brain; the hollow of the prosencephalon. [ pro- + G. koilia, a hollow]
procelous
Concave anteriorly. [ pro- + G. koilos, hollow]
procentriole
The early phase in development de novo of centrioles or basal bodies from the centrosphere; procentrioles form in relation to deuterosomes (p. organizers).
procephalic
Relating to the anterior part of the head. [ pro- + G. kephale, head]
procercoid
The first stage in the aquatic life cycle of certain tapeworms, such as the pseudophyllideans (family Diphyllobothriidae), following ingestion of the newly hatched larva ( ...
procerus
SYN: p. (muscle). [L. long, stretched out]
Process
In anatomy, a process is a projection from a structure. The process of the mandible is the part of the lower jaw that projects forward. In a more general sense, a process is a ...
processing
1. Posttranslational modification of proteins, particularly secretory proteins and proteins targeted for membranes or specific cellular locations. SYN: trafficking. 2. ...
processor
A device that converts one form of energy into another form of energy or one form of material into another form of material. - speech p. the part of a cochlear implant that ...
processus
SYN: process (1). [L. see process] - p. accessorius vertebrae lumbalis [TA] SYN: accessory process of lumbar vertebra. - p. alveolaris maxillae SYN: alveolar process of maxilla. ...
procheilia, prochilia
Protruding lips. [ pro- + G. cheilos, lip]
procheilon, prochilon
SYN: tubercle of upper lip.
prochiral
Refers to an atom in a molecule (usually a carbon atom) that would become chiral if one of two identical substituents is replaced by a new ligand; I.E., an atom that has two ...
prochirality
The property of being prochiral.
prochlorperazine
A phenothiazine compound similar in structure, actions, and uses to chlorpromazine; used as a tranquilizer and antiemetic; available as the edisylate for oral and ...
prochondral
Denoting a developmental stage prior to the formation of cartilage. [ pro- + G. chondros, cartilage]
prochordal
Located cephalic to the notochord. SYN: prechordal.
prochymosin
The precursor of chymosin. SYN: chymosinogen, pexinogen, prorennin, renninogen, rennogen.
procidentia
A sinking down or prolapse of any organ or part; usually related to prolapse of the uterus. [L. a falling forward, fr. procido, to fall forward] - p. uteri prolapse of the ...
Proclivity
An inclination or predisposition toward something, especially a strong inherent inclination toward something objectionable. For example, a patient might be said to have a ...
procollagen
Soluble precursor of collagen formed by fibroblasts and other cells in the process of collagen synthesis; unstable type III p. is associated with Ehlers-Danlos syndrome type IV. - ...
proconvertin
SYN: factor VII.
procreate
To beget; to produce by the sexual act; said usually of the male parent. [L. pro-creo, pp. -creatus, to beget]
procreation
SYN: reproduction (1).
procreative
Having the power to beget or procreate.
proct-
See procto-.
proctalgia
Pain at the anus, or in the rectum. SYN: proctodynia, rectalgia. [ proct- + G. algos, pain] - p. fugax painful spasm of the muscle about the anus without known cause; probably a ...
proctatresia
SYN: anal atresia. [ proct- + G. a- priv. + tresis, a boring]
proctectasia
Obsolete term for dilation of the anus or rectum. [ proct- + G. ektasis, extension]
proctectomy
Surgical resection of the rectum. SYN: rectectomy. [ proct- + G. ektome, excision]
Proctitis
Inflammation of the rectum. This may be due to a considerable number of causes, among them infectious agents and ulcerative colitis. Infectious proctitis is often due to agents ...
Proctitis, ulcerative
Ulcerative colitis that is limited to the rectum. Ulcerative colitis itself is a relatively common disease involving inflammation of the large intestine (the colon). The cause ...
procto-, proct-
Anus; (more frequently) rectum; Cf.:recto-. [G. proktos]
proctocele
Prolapse or herniation of the rectum. SYN: rectocele. [procto- + G. kele, tumor]
proctoclysis
Slow continuous administration of saline solution by instillation into the rectum and sigmoid colon. SYN: Murphy drip, rectoclysis. [procto- + G. klysis, a washing out]
proctococcypexy
Suture of a prolapsing rectum to the tissues anterior to the coccyx. SYN: rectococcypexy. [procto- + G. kokkyx, coccyx, + pexis, fixation]
proctocolectomy
Surgical removal of the rectum together with part or all of the colon. [procto- + G. kolon, colon, + ektome, excision]
proctocolitis
SYN: coloproctitis.
proctocolonoscopy
Inspection of interior of rectum and colon. [procto- + G. kolon, colon, + skopeo, to view]
proctocolpoplasty
Surgical closure of a rectovaginal fistula. [procto- + G. kolpos, bosom (vagina), + plastos, formed]
proctocystocele
Herniation of the bladder into the rectum. [procto- + G. kystis, bladder, + kele, hernia]
proctocystoplasty
Surgical closure of a rectovesical fistula. [procto- + G. kystis, bladder, + plastos, formed]
proctocystotomy
Incision into the bladder from the rectum. [procto- + G. kystis, bladder, + tome, incision]
proctodeal
Relating to the proctodeum.
proctodeum
1. An ectodermally lined depression under the root of the tail, adjacent to the terminal part of the embryonic hindgut; at its bottom, proctodeal ectoderm and cloacal ...
proctodynia
SYN: proctalgia. [procto- + G. odyne, pain]
proctologic
Relating to proctology.
proctologist
A specialist in proctology.
Proctology
A medical specialty that deals with disorders of the rectum and anus. * * * Surgical specialty concerned with the anus and rectum and their diseases. [procto- + G. logos, study]
proctoparalysis
Paralysis of the anus, leading to incontinence of feces.
proctoperineoplasty
Plastic surgery of the anus and perineum. SYN: rectoperineorrhaphy. [procto- + perineum, + G. plastos, formed]
proctopexy
Surgical fixation of a prolapsing rectum. SYN: rectopexy. [procto- + G. pexis, fixation]
proctophobia
A morbid fear of rectal disease. SYN: rectophobia. [procto- + G. phobos, fear]
proctoplasty
Plastic surgery of the anus or rectum. SYN: rectoplasty. [procto- + G. plastos, formed]
proctoplegia
Paralysis of the anus and rectum occurring with paraplegia. [procto- + G. plege, stroke]
proctopolypus
Polypus of the rectum.
proctoptosia, proctoptosis
Prolapse of the rectum and anus. [procto- + G. ptosis, a falling]
proctorrhagia
State characterized by having a bloody discharge from the anus. [procto- + G. rhegnymi, to burst forth]
proctorrhaphy
Repair by suture of a lacerated rectum or anus. SYN: rectorrhaphy. [procto- + G. rhaphe, suture]
proctorrhea
A mucoserous discharge from the rectum. [procto- + G. rhoia, a flow]
proctoscope
A rectal speculum. SYN: rectoscope. [procto- + G. skopeo, to view] - Tuttle p. a tubular rectal speculum illuminated at its distal extremity; after introduction, the ...
proctoscopy
Visual examination of the rectum and anus, as with a proctoscope. SYN: rectoscopy.
proctosigmoid
The area of the anal canal and sigmoid colon, usually used to describe the region visualized by sigmoidoscopy.
proctosigmoidectomy
Excision of the rectum and sigmoid colon. [procto- + sigmoid, + G. ektome, excision]
proctosigmoiditis
Inflammation of the sigmoid colon and rectum. [procto- + sigmoid + G. -itis, inflammation]
proctosigmoidoscope
Instrument used for examination of the sigmoid colon and rectum.
Proctosigmoidoscopy
: An examination of the rectum and the lower part of the colon using a thin, lighted instrument called a sigmoidoscope. * * * Direct inspection through a sigmoidoscope of the ...
proctospasm
1. Spasmodic contraction of the anus. 2. Spasmodic contraction of the rectum. [procto- + G. spasmos, spasm]
proctostasis
Constipation with stasis in the rectum. [procto- + G. stasis, a standing]
proctostat
A tube containing radium for insertion through the anus in the treatment of rectal cancer; obsolete. [procto- + G. statos, standing]
proctostenosis
Stricture of the rectum or anus. SYN: rectostenosis. [procto- + G. stenosis, a narrowing]
proctostomy
The formation of an artificial opening into the rectum. SYN: rectostomy. [procto- + G. stoma, mouth]
proctotome
An instrument for use in proctotomy. SYN: rectotome.
proctotomy
An incision into the rectum. SYN: rectotomy. [procto- + G. tome, incision]
proctotresia
Operation for correction of an imperforate anus. [procto- + G. tresis, a boring]
proctovalvotomy
Incision of rectal valves.
procumbent
Rarely used term denoting in a prone position; lying face down. [L. procumbens, falling or leaning forward]
procurvation
Rarely used term for a bending forward. [L. pro-curvo, to bend forward]
procyclidine hydrochloride
An anticholinergic agent used in the treatment of paralysis agitans and drug-induced parkinsonism.
procyclidine methochloride
An anticholinergic drug used in the treatment of functional gastrointestinal spasm. SYN: tricyclamol chloride.
prodigiosin
A red pigment synthesized by the bacterium Serratia marcescens; an antifungal agent.
prodromal
Relating to a prodrome. SYN: prodromic, prodromous, proemial.
prodrome
An early or premonitory symptom of a disease. SYN: prodromus. [G. prodromos, a running before, fr. pro- + dromos, a running, a course]
prodromic, prodromous
SYN: prodromal.
prodromus
SYN: prodrome.
prodrug
A class of drugs, the pharmacologic action of which results from conversion by metabolic processes within the body (biotransformation).
product
1. Anything produced or made, either naturally or artificially. 2. In mathematics, the result of multiplication. [L. productus, fr. pro-duco, pp. -ductus, to lead forth] - ...
Product, gene
The RNA or protein that results from the expression of a gene. The amount of gene product is a measure of the degree of gene activity.
productive
Producing or capable of producing; denoting especially an inflammation leading to the production of new tissue with or without an exudate. [see product]
proelastase
The precursor protein of elastase; formed in the pancreas (in vertebrates) and converted to elastase by the action of trypsin.
proemial
SYN: prodromal. [L. prooemium, fr. G. prooimion, prelude]
proencephalon
SYN: prosencephalon.
proenkephalin
A precursor protein that contains several enkephalin sequences. Cf.:propiocortin.
proenzyme
The precursor of an enzyme, requiring some change (usually the hydrolysis of an inhibiting fragment that masks an active grouping) to render it active; e.g., pepsinogen, ...
proerythroblast
SYN: pronormoblast.
proerythrocyte
The precursor of an erythrocyte; an immature red blood cell with a nucleus.
proestrogen
A substance that acts as an estrogen only after it has been metabolized in the body to an active compound.
proestrum
SYN: proestrus.
proestrus
The period in the estrus cycle preceding estrus, characterized by the growth of the graafian follicles and physiologic changes related to estrogen production. SYN: proestrum.
profenamine hydrochloride
SYN: ethopropazine hydrochloride.
Profeta
Giuseppe, Italian dermatologist, 1840–1910. See P. law.
profibrinolysin
See plasmin.
profilactin
A complex of actin and profilin. Cf.:profilin.
profile
1. An outline or contour, especially one representing a side view of the human head. SYN: norma (2). 2. A summary, brief account, or record. [It. profilo, fr. L. pro, forward, + ...
profilin
A small protein that binds to monomeric actin (thus becoming profilactin), preventing premature polymerization of actin. It also participates in the inhibition of one isoform ...
profilometer
An instrument for measuring the roughness of a surface, e.g., of teeth.
proflavine
The neutral sulfate of 3,6-diaminoacridine; a compound closely allied to acriflavine, having similar antiseptic properties.
proformiphen
SYN: phenprobamate.
profunda
The deep one; a term applied to structures (muscles, nerves, veins, and arteries, etc.) that lie deep in the tissues, especially when contrasted with a similar, more superficial ( ...
profundus
SYN: deep. [L.]
profusion
A score reflecting the number of visible lesions in a region on chest radiographs of individuals with pneumoconiosis. See International Labour Organization Classification. [L. ...
progabide
An anticonvulsant that is a lipid-soluble derivative of the amidated form of γ-aminobutyric acid (GABAmide) that, unlike γ-aminobutyric acid ( GABA) itself, is able to cross ...
progastrin
Precursor of gastric secretion in the mucous membrane of the stomach.
progenia
SYN: prognathism. [ pro- + L. gena, cheek]
progenitalis
On any of the exposed surfaces of the genitalia. [L. prefix pro-, before, in front of, + genitalis, pertaining to the reproductive organs, fr. gigno, to bear]
progenitor
A precursor, ancestor; one who begets. [L.]
Progeny
The children and other descendants. For example one might say that the progeny of someone with a genetic (inherited) condition such as Huntington disease are themselves at risk ...
Progeria
A disorder characterized by premature aging. There is more than one type of progeria, and the mechanism behind these disorders is not yet known. Researchers have recently found ...
progestational
1. Favoring pregnancy; conducive to gestation; capable of stimulating the uterine changes essential for implantation and growth of a fertilized ovum. 2. Referring to ...
Progesterone
: A female hormone, progesterone is the principal progestational hormone. Progestational hormones prepare the uterus (the womb) to receive and sustain the fertilized egg. * * ...
progestin
1. A hormone of the corpus luteum. 2. Generic term for any substance, natural or synthetic, that effects some or all of the biologic changes produced by progesterone. 3. SYN: ...
progestogen
1. Any agent capable of producing biologic effects similar to those of progesterone; most progestogens are steroids like the natural hormones. 2. A synthetic derivative from ...
proglossis
The anterior portion, or tip, of the tongue. [ pro- + G. glossa, tongue]
proglottid
One of the segments of a tapeworm, containing the reproductive organs. SYN: proglottis. [ pro- + G. glossa, tongue]
proglottis
SYN: proglottid.
prognathic
1. Having a projecting jaw; having a gnathic index above 103. 2. Denoting a forward projection of either or both of the jaws relative to the craniofacial skeleton. SYN: ...
prognathism
The condition of being prognathic; abnormal forward projection of one or of both jaws beyond the established normal relationship with the cranial base; the mandibular condyles ...
prognathous
SYN: prognathic.
prognose
SYN: prognosticate.
Prognosis
: The probable outcome or course of a disease; the patient's chance of recovery. * * * A forecast of the probable course and/or outcome of a disease. [G. p., fr. pro, before, + ...
prognostic
1. Relating to prognosis. 2. A symptom upon which a prognosis is based, or one indicative of the likely outcome. [G. prognostikos]
prognosticate
To give a prognosis. SYN: prognose.
prognostician
One skilled in prognosis.
progonoma
A nodule or mass resulting from displacement of tissue when atavism occurs in embryonic development; represents a reversion to structures not normally occurring in the ...
prograde
In the normal direction of flow.
program
1. A formal set of procedures for conducting an activity. 2. An ordered list of instructions directing a computer to carry out a desired sequence of operations required to solve ...
Programmed cell death
Also called apoptosis, a form of cell death in which a programmed sequence of events leads to the elimination of cells without releasing harmful substances into the surrounding ...
programming
Sequential instruction; a method of training in discrete segments. - neurolinguistic p. a branch of cognitive-behavioral psychology employing specific techniques, that use ...
progranulocyte
SYN: promyelocyte.
progress
1. (prog′res)An advance; the course of a disease. 2. (pro-gres′)To advance; to go forward; said of a disease, especially, when unqualified, of one taking an unfavorable ...
Progressive
Increasing in scope or severity. Advancing. Going forward. In medicine, a disease that is progressive is going from bad to worse. * * * Going forward; advancing; denoting the ...
Progressive infantile poliodystrophy, Alpers
A progressive disease of the nervous system characterized by spasticity (tightness), myoclonus and dementia and by liver problems with jaundice and cirrhosis. This disorder, ...
Progressive multifocal leukoencephalopathy
A rapidly progressive, often fatal viral infection of the brain. Commonly abbreviated as PML. PML is believed to be due to the Jacob-Creutzfeldt (JC) papovavirus. The virus ...
Progressive supranuclear palsy
A neurologic disorder of unknown origin that gradually destroys cells in many areas of the brain, leading to serious and permanent problems with the control of gait and balance. ...
proguanil hydrochloride
SYN: chloroguanide hydrochloride.
prohormone
1. An intraglandular precursor of a hormone; e.g., proinsulin. Cf.:prehormone. 2. Obsolete term formerly used to designate a substance developed in serum that antagonizes a ...
proinsulin
A single-chain precursor of insulin.
projection
1. A pushing out; an outgrowth or protuberance. 2. The referring of a sensation to the object producing it. 3. A defense mechanism by which a repressed complex in the ...
Prokaryotae
A superkingdom of cellular organisms that includes the kingdom Monera (bacteria and blue-green algae) and is characterized by the prokaryotic condition, minute size (0.2–10 ...
Prokaryote
Cell lacking a discrete nucleus and other special subcellular compartments. Bacteria and viruses are prokaryotes. Humans are not prokaryotes, but rather eukaryotes. * * * A ...
prokaryotic
Pertaining to or characteristic of a prokaryote. SYN: procaryotic.
prolabial
Denoting the isolated central soft-tissue segment of the upper lip in the embryonic state and in an unrepaired bilateral cleft palate.
prolabium
1. The exposed carmine margin of the lip. 2. The isolated central soft-tissue segment of the upper lip in the embryonic state and in an unrepaired bilateral cleft palate. [ pro- ...
prolactin
A protein hormone of the anterior lobe of the hypophysis that stimulates the secretion of milk and possibly, during pregnancy, breast growth. SYN: galactopoietic hormone, ...
prolactinoma
SYN: prolactin-producing adenoma.
prolamines
Proteins insoluble in water or neutral salt solutions, soluble in dilute acids or alkalies, and in 50–90% alcohol; e.g., gliadin, zein, hordein; all have relatively high ...
prolapse
1. To sink down, said of an organ or other part. 2. A sinking of an organ or other part, especially its appearance at a natural or artificial orifice. SEE ALSO: procidentia, ...
prolective
Pertaining to data collected by planning in advance proportional mortality ratio. Number of deaths from a given cause in a specified period, per 100 or per 1000 total deaths. [ ...
prolepsis
Recurrence of the paroxysm of a periodical disease at regularly shortening intervals. [G. p., anticipation]
proleptic
Relating to prolepsis. SYN: subintrant.
proleukocyte
SYN: leukoblast.
prolidase
SYN: proline dipeptidase.
proliferate
To grow and increase in number by means of reproduction of similar forms. [L. proles, offspring, + fero, to bear]
proliferation
Growth and reproduction of similar cells. - diffuse mesangial p. SYN: mesangial proliferative glomerulonephritis. - gingival p. SYN: gingival hyperplasia.
Proliferative
Growing and increasing in number rapidly. For example, the lymphoproliferative disorders are diseases in which there is malignant growth of lymphoid cells and of cells from the ...
proliferative, proliferous
Increasing the numbers of similar forms.
prolific
Fruitful; bearing many children. [L. proles, offspring, + facio, to make]
proligerous
Germinating; producing offspring. [L. proles, offspring, + gero, to bear]
prolinase
SYN: prolyl dipeptidase.

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