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Слова на букву basi-chem (2629)

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Bernard
Jean, French physician, *1907. See B.- Soulier disease, B.- Soulier syndrome. Claude, French physiologist, 1813–1878. See B. canal, B. duct, B. puncture, B.-Cannon ...
Bernard syndrome
A complex of abnormal findings, namely sinking in of one eyeball, ipsilateral ptosis (drooping of the upper eyelid on the same side) and miosis (constriction of the pupil of ...
Bernard, Christiaan
South African surgeon (1922-2001) who pioneered cardiac transplantation. Dr. Bernard did the world’s first heart transplant on December 3, 1967. The heart donor was Denise ...
Bernard-Soulier syndrome (giant platelet syndrome)
The Bernard-Soulier syndrome is a primary problem of platelets in which the platelets lack the ability to stick adequately to injured blood vessel walls. This is a crucial aspect ...
Bernays
Augustus C., U.S. surgeon, 1854–1907. See B. sponge.
Bernhardt
Martin, German neurologist, 1844–1915. See B. disease, B.-Roth syndrome.
Bernhardt formula
See under formula.
Bernheim
P., early 20th century French physician. See B. syndrome.
Bernoulli
Daniel, Swiss mathematician, 1700–1782. See B. effect, B. law, B. principle, B. theorem.
Bernoulli trial
A single random event for which there are two and only two possible outcomes that are mutually exclusive and have a priori fixed (and complementary) probabilities of resulting. ...
Bernstein
Lionel M., U.S. internist, *1923. See B. test.
Berry
Sir James, Canadian surgeon, 1860–1946. See B. ligaments, under ligament.
Berry aneurysm
A berry aneurysm is a small outpouching (an aneurysm) that looks like a berry and classically occurs at the point at which a cerebral artery departs from the circular artery ...
Berson
Solomon A., U.S. internist, 1918–1972.. See B. test.
Berthelot
Pierre Eugene Marcellin, French chemist, 1827–1907. See B. reaction.
Berthollet
Claude L., French chemist, 1748–1822. See B. law.
Bertiella studeri
Common tapeworm found in primates; incidental zoonotic infections in humans in the tropics have been reported.
bertiellosis
Infection of primates, including humans, with cestodes of the genus Bertiella.
Bertin
Exupère Joseph, French anatomist, 1712–1781. See B. bones, under bone, B. columns, under column, B. ligament, B. ossicles, under ossicle.
Bertrand
Ivan Georges, 20th century French neurologist. See Canavan-van Bogaert-B. disease.
berylliosis
Beryllium poisoning characterized by the occurrence of acute pneumonia or chronic interstitial granulomatous fibrosis, especially of the lungs, from inhalation of beryllium.
beryllium
A white metal element belonging to the alkaline earths; atomic no. 4., atomic wt. 9.012182. [G. beryllos, beryl]
Berzelius
J.J., Swedish chemist, 1779–1848.
Besnier
Ernest H., French dermatologist, 1831–1909. See B. prurigo, B.-Boeck- Schaumann syndrome.
Besnoitiidae
A family of protozoan parasites, similar to those of the family Toxoplasmatidae, to which the genus Besnoitia belong.
Best
Franz, German pathologist, 1878–1920. See B. disease, B. carmine stain.
bestiality
SYN: zoophilia. [L. bestia, beast]
besylate
USAN-approved contraction for benzenesulfonate.
beta
Second letter of the Greek alphabet, β (see entry at start of letter “B's.” [G.]
Beta adrenergic blocking drugs
A class of drugs, also called beta blockers, that block beta-adrenergic substances such as adrenaline (epinephrine), a key agent in the "sympathetic" portion of the autonomic ...
Beta blocker
A class of drugs that block beta-adrenergic substances such as adrenaline (epinephrine), a key agent in the "sympathetic" portion of the autonomic (involuntary) nervous system. ...
Beta carotene
An antioxidant that protects cells against oxidation damage. Beta carotene is converted to vitamin A. Food sources of beta carotene include vegetables such as carrots, sweet ...
Beta error
The statistical error (said to be "of the second kind" or type II) made in testing when it is concluded that something is negative when it really is positive. Beta error ...
beta sheets
A structure of proteins where the peptide is extended and stabilized by hydrogen bonding between NH and CO groups of different polypeptide chain backbones or separate regions of ...
beta-blocker
SYN: β-adrenergic blocking agent.
Beta-secretase
An enzyme that appears to be directly involved in the early development of Alzheimer's disease. Beta-secretase is a protease (an enzyme that catalyses the splitting of interior ...
betacism
A defect in speech in which the sound of b is given to other consonants. [G. beta, the second letter of the alphabet]
betacyanin
One of several red plant pigments; a betalain. An example is betanin. Elevated in urine of individuals with beeturia. [L. beta, beet, + G. kyanos, dark blue substance, + -in]
betacyaninuria
SYN: beeturia. [ betacyanin + G. ouron, urine]
Betaherpesvirinae
A subfamily of Herpesviridae containing Cytomegalovirus and Roseolovirus.
betahistine hydrochloride
An inhibitor of diamine oxidase used as a histaminelike agent for treatment of Ménière disease.
betaine
1. An oxidation product of choline and a transmethylating intermediate in metabolism. 2. A class of compounds related to b.. (1) ( i.e., R3N=—CHR′—COO−), e.g., glycine ...
betaine-aldehyde dehydrogenase
An oxidizing enzyme that catalyzes the oxidation of betaine aldehyde with NAD+ and water to betaine and NADH; part of the choline oxidase system and of choline metabolism.
betalains
A group of plant pigments found almost exclusively in the family Centrospermae, e.g., betanin. There are two groups: betacyanines (in plants with a red-violet color) and ...
betamethasone
A semisynthetic glucocorticoid with anti-inflammatory effects and toxicity similar to those of cortisol; not useful in the treatment of adrenal insufficiency because it causes ...
betanidine sulfate
SYN: bethanidine sulfate.
betanin
The red pigment in beets (Beta vulgaris); elevated in urine of individuals with beeturia. [fr. betacyanin]
betatron
A circular electron accelerator that is a source of either high energy electrons or x-rays.
betaxolol hydrochloride
A β-adrenergic blocking agent used primarily in the treatment of ocular hypertension and chronic open-angle glaucoma.
betazole hydrochloride
An analogue of histamine that stimulates gastric secretion by an action on H2 receptors with less tendency to produce the side effect s seen with histamine; used, in place of ...
betel
The dried leaves of Piper betle (family Piperaceae), a climbing East Indian plant; used as a stimulant and narcotic. [Pg. b., betle, fr. Malayalam or Tamil vetilla]
betel nut
Areca nut, the nut of the areca palm, Areca catechu (family Palmae), of the East Indies, chewed by the natives; contains arecoline; produces central nervous system ...
bethanechol chloride
A parasympathomimetic agent, used to relieve constipation, paralytic ileus, and urinary retention.
bethanidine sulfate
An adrenergic blocking agent used for palliative treatment of hypertension. SYN: betanidine sulfate.
Bethesda-Ballerup Group
A group of citrate-utilizing, slow lactose-fermenting bacteria (family Enterobacteriaceae) which share a similar series of antigens with the lactose-fermenting citrobacters; ...
Betke-Kleihauer test
See under test.
Bettendorff
Anton J., German chemist, 1839–1902. See B. test.
betula
European white birch, bark and leaves of B. alba (family Betulaceae); native to Europe, northern Asia, and North America, north of Pennsylvania. It contains betulin (b. ...
Betz
Vladimir A., Russian anatomist, 1834–1894. See B. cells, under cell.
Beuren
Alois J., 20th century German cardiologist. See B. syndrome.
Bevan-Lewis
William, English physician and physiologist, 1847–1929. See Bevan- Lewis cells, under cell.
bevel
1. A surface having a sloped or slanting edge. 2. The incline that one surface or line makes with another when not at right angles. 3. The edge of a cutting instrument. 4. To ...
bevonium methyl sulfate
An anticholinergic agent. SYN: pyribenzyl methyl sulfate.
Bezoar
A clump or wad of swallowed food and/or hair. Bezoars can sometimes be found to cause blockage of the digestive system, especially at the exit of the stomach. When a bezoar is ...
Bezold
Friedrich, German otologist, 1842–1908. See B. abscess. Albert von, German physiologist, 1836–1868. See B. ganglion, B.- Jarisch reflex.
BF
Abbreviation for "black female" used by doctors as shorthand when jotting down the results of their physical examination. For example, a WDWNBF = well developed, well nourished ...
BGP
Abbreviation for bone Gla protein.
BHA
Abbreviation for butylated hydroxyanisole.
bhang
Name given in the East to powdered preparation of Cannabis sativa that is chewed or smoked by the local residents. SEE ALSO: cannabis. [Hind.]
BHN
Abbreviation for Brinell hardness number.
BHT
Abbreviation for butylated hydroxytoluene.
Bi
Symbol for bismuth.
Bi-
Prefix meaning two, as in biceps or bicuspid. * * * 1. Prefix meaning twice or double, referring to double structures or dual actions. 2. In chemistry, used to denote a ...
Bial
Manfred, German physician, 1869–1908. See B. test.
Bianchi
Giovanni B., Italian anatomist, 1681–1761. See B. nodule.
biarticular
SYN: diarthric.
Bias
In a clinical trial, bias refers to effects that a conclusion that may be incorrect as, for example, when a researcher or patient knows what treatment is being given. To avoid ...
biasterionic
Relating to both asterions, especially the b. diameter, or b. width, the shortest distance from one asterion to the other.
biauricular
Relating to both auricles, in any sense.
bib.
Abbreviation for L. b., drink.
bibliomania
Morbidly intense desire to collect and possess books, especially rare books. [G. biblion, book, + mania, frenzy]
bibulous
SYN: absorbent (1). [L. bibulus, drinking freely, absorbent]
bicameral
Having two chambers; denoting especially an abscess divided by a more or less complete septum. [bi- + L. camera, chamber]
bicapsular
Having a double capsule.
Bicarbonate
In medicine, bicarbonate usually refers to bicarbonate of soda (sodium bicarbonate, baking soda) white powder that is common ingredient in antacids. Also, the bicarbonate level ...
bicardiogram
The composite curve of an electrocardiogram representing the combined effects of the right and left ventricles.
bicellular
Having two cells or subdivisions.
bicephalus
SYN: dicephalus.
Biceps
The biceps is a muscle that has two heads or origins. In Latin, biceps means two-headed and is derived from "bis", twice + "caput", head. There is more than one biceps muscle. ...
Bichat
Marie F.X., French anatomist, physician, and biologist, 1771–1802. See B. canal, B. fat-pad, B. fissure, B. fossa, B. ligament, B. membrane, B. protuberance, B. tunic.
bicho
SYN: epidemic gangrenous proctitis.
biciliate
Having two cilia.
bicipital
1. Two-headed. 2. Relating to a biceps muscle. [bi- + L. caput, head]
Bickel
Gustav, 19th century German physician. See B. ring.
biclonal
Pertaining to or characterized by biclonality.
biclonality
A condition in which some cells have markers of one cell line and other cells have markers of another cell line, as in biclonal leukemias.
biconcave
Concave on two sides; denoting especially a form of lens. SYN: concavoconcave.
biconvex
Convex on two sides; denoting especially a form of lens. SYN: convexoconvex.
bicornous, bicornuate, bicornate
Two-horned; having two processes or projections. [bi- + L. cornu, horn]
Bicornuate
Having two horns or horn-shaped branches. The uterus (normally unicornuate) can sometimes be bicornuate (with two branches, eg, one at about 10:30 and the other at about 1:30).
bicro-
SYN: pico- (2).
bicron
SYN: picometer.
bicuculline
An alkaloid naturally occurring in the d-form; found in Dicentra cucullaria and Adlumia fungosa (family Fumariaceae) and several Corydalis species; a powerful convulsant that ...
Bicuspid
Having two flaps or cusps. The heart valve that is called the bicuspid valve is located between the left atrium and left ventricle. Although the aortic valve in the heart ...
Bicuspid aortic valve
Whereas the normal aortic valve in the heart has three flaps (cusps) that open and close, a bicupid valve has only two. There may be no symptoms in childhood, but in time the ...
Bicuspid valve
One of the four valves of the heart, this valve is situated between the left atrium and the left ventricle. It permits blood to flow one way only, from the left atrium into the ...
bicuspidization
Surgical change of a normally tricuspid valve into a functioning bicuspid valve; performed in correction of tricuspid valvar disease.
Bicycle helmet
A well-known but often neglected device designed to protect the head of a bicyclist. Helmets decrease the risk of head injuries (traumatic brain damage) by about 85%. However, ...
bid (on prescription)
Seen on a prescription, bid means twice (two times) a day. It is an abbreviation for " bis in die" which in Latin means twice a day. The abbreviation bid is sometimes written ...
bidactyly
Abnormality in which the medial digits are lacking, with only the first and fifth represented. SEE ALSO: lobster- claw deformity, ectrodactyly. [bi- + G. daktylos, finger]
bidet
A tub for a sitz bath, having also an attachment for giving vaginal or rectal infusions. [Fr. a small horse]
bidiscoidal
Resembling, or consisting of, two disks.
BIDS
Acronym for brittle hair, impaired intelligence, decreased fertility, and short stature; the brittle hair may be due to an inherited deficiency of a high-sulfur protein; ...
biduous
Rarely used term denoting of two days' duration. [L. biduus, lasting two days, fr. bi- + dies, day]
Biebl
M. See B. loop.
Biebrich scarlet red
SYN: scarlet red. [Biebrich, Germany]
Biederman
Joseph, U.S. physician, *1907. See B. sign.
Biedl
Artur, Austrian physician, 1869–1933. See Bardet-B. syndrome.
Bielschowsky
Max, German neuropathologist, 1869–1940. See B. disease, B. stain, Jansky-B. disease. Alfred, German ophthalmologist, 1871–1940. See B. sign.
Biemond
Avic, French neurologist, *1902. See B. syndrome.
Bier
August K.G., German surgeon, 1861–1949. See B. amputation, B. hyperemia, B. method.
Biermer
Anton, German physician, 1827–1892. See B. anemia, B. disease, Addison-B. disease.
Biermer's anemia
A blood disorder caused by a lack of vitamin B12. Patients who have this disorder do not produce the substance in the stomach that allows the body to absorb vitamin B12. This ...
Biesiadecki
Alfred von, Polish physician, 1839–1888. See B. fossa.
bifascicular
Involving two of the presumed three major fascicles of the ventricular conduction system of the heart.
Bifid
Cleft (split) in two. See, for example, bifid uvula. * * * Split or cleft; separated into two parts. [L. bifidus, cleft in two parts]
Bifid uvula
The uvula, the little V-shaped fleshy mass hanging from the back of the soft palate, is cleft or split. Cleft uvula is a common minor anomaly occurring in about 1% of whites ...
Bifidobacterium
A genus of anaerobic bacteria (family Actinomycetaceae) containing Gram-positive rods of highly variable appearance; freshly isolated strains characteristically show true and ...
bifocal
Having two foci.
biforate
Having two openings. [bi- + L. foro, pp. -atus, to bore, pierce]
bifunctional
Referring to a molecule containing two reactive functional groups; cross-linking reagents are b. compounds.
bifurcate, bifurcated
Forked; two-pronged; having two branches. [bi- + L. furca, fork]
bifurcatio
SYN: bifurcation. - b. aortae [TA] SYN: aortic bifurcation. - b. tracheae [TA] SYN: tracheal bifurcation. - b. trunci pulmonalis [TA] SYN: bifurcation of pulmonary trunk.
bifurcation
A forking; a division into two branches. SYN: bifurcatio [TA]. - b. of aorta SYN: aortic b.. - aortic b. [TA] the division of the aorta into right and left common iliac ...
Big toe sign
An important neurologic examination based upon what the big toe (and other toes) do when the sole of the foot is stimulated. If the big toe goes up, that may mean trouble. The big ...
Bigelow
Henry J., U.S. surgeon, 1818–1890. See B. ligament, B. septum.
bigemina
SYN: bigeminal pulse.
bigeminal
Paired; double; twin.
bigemini
SYN: bigeminy.
bigeminum
One of the corpora bigemina. [L. ntr. of bigeminus, doubled]
bigeminy
Pairing; especially, the occurrence of heart beats in pairs. SYN: bigemini. [bi- + L. geminus, twin] - atrial b. pairing of atrial beats, as when an atrial extrasystole is ...
bigerminal
Relating to two germs or ova.
bigitalin
SYN: gitoxin.
biglycan
A small interstitial proteoglycan that contains two glycosaminoglycan chains. SYN: proteoglycan I.
Bignami
Amico, Italian physician, 1862–1929. See Marchiafava-B. disease.
bikunin
A plasma glycoprotein that is found in both the free state and covalently bound to the heavy chains of certain protease inhibitors. It may participate in cell growth, oocyte ...
bilabe
A forceps for seizing and removing urethral or small vesical calculi. [bi- + L. labium, lip]
Bilateral
Having, or relating to, two sides. Bilateral is as opposed, for example, to unilateral (which means having, or relating to, one side). * * * Relating to, or having, two sides. ...
bilateralism
A condition in which the two sides are symmetrical.
Bile
: Bile is a yellow-green fluid that is made by the liver, stored in the gallbladder and passes through the common bile duct into the duodenum where it helps digest fat. The ...
Bile acid resin
Bile acid resins are substances that bind in the intestines with bile acids that contain cholesterol and are then eliminated in the stool. The major effect of bile acid resins is ...
Bile sludge
A mixture of microscopic particulate matter in bile that occurs when particles of material precipitate from bile. (Bile is the fluid that is made by the liver. It is stored in ...
Bilharz
Theodor M., German tropical disease specialist, 1829–1862. See Bilharzia, bilharzial appendicitis, bilharzial dysentery, bilharzial granuloma.
Bilharzia
Disease caused by worms that parasitize people. Also called schistosomiasis. Three main species of these trematode worms (flukes)—Schistosoma haematobium, S. japonicum, and S. ...
Bilharziasis
a parasite infection by a trematode worm acquired from infested water. Also known as schistosomiasis. Species which live in man can produce liver, bladder, and gastrointestinal ...
bilharzioma
A tumor-like inflammatory and fibrous swelling of the intestinal serosa, mesentery, or skin, caused by schistosomiasis.
bilharziosis
SYN: schistosomiasis.
bili-
Bile. [L. bilis, bile]
Biliary
Having to do with the gallbladder, bile ducts, or bile. The biliary system itself consists of the gallbladder and bile ducts and, of course, the bile. For example, biliary ...
Biliary atresia
Congenital absence or closure of the major bile ducts, the ducts that drain bile from the liver. Biliary atresia results in a progressive inflammatory process which may lead to ...
Biliary sand
Biliary sand is a term mostly used by surgeons when they remove the gallbladder to describe uncountable, small particles in bile that are visible to the naked eye. Biliary sand ...
Biliary sludge
A mixture of microscopic particulate matter in bile that occurs when particles of material precipitate from bile. (Bile is the fluid that is made by the liver. It is stored in ...
bilifaction, bilification
Rarely used terms for bile formation. [ bili- + L. facio, pp. factus, to make]
biliferous
Rarely used term for containing or carrying bile.
biligenesis
Bile production. [ bili- + G. genesis, production]
biligenic
Bile-producing.
bilin, biline
The chain of four pyrrole residues resulting from the cleavage of one bond of one of the four methylidene residues of the porphin part of a porphyrin; specifically, the ...
Bilious
The adjective for bile, bilious has three meanings. It means of or relating to bile. By extension, bilious means suffering from liver dysfunction (and especially excessive ...
Biliousness
A term used in the 18th and 19th centuries pertaining to bad digestion, stomach pains, constipation, and excessive flatulence (passing gas). The quantity or quality of the bile ...
bilirachia
Occurrence of bile pigments in the spinal fluid. [ bili- + G. rhachis, spine]
bilirubin
A yellow bile pigment found as sodium bilirubinate (soluble), or as an insoluble calcium salt in gallstones; formed from hemoglobin during normal and abnormal destruction of ...
bilirubin-glucuronoside glucuronosyltransferase
Bilirubin monoglucuronide transglucuronidase; a transferase that transfers a glucuronoside from one molecule of bilirubin glucuronoside to another, forming bilirubin ...
bilirubinemia
The presence of bilirubin in the blood, where it is normally present in relatively small amounts; the term is usually used in relation to increased concentrations observed in ...
bilirubinglobulin
A bilirubin-globulin complex; a transport form of bilirubin to the liver where bilirubin is converted to a diglucuronic acid derivative and passes into the bile.
bilirubinoids
Generic term denoting intermediates in the conversion of bilirubin to stercobilin by reductive enzymes in intestinal bacteria. Included are mesobilirubin, mesobilane, ...
bilirubinuria
The presence of bilirubin in the urine. [ bilirubin + G. ouron, urine]
bilitherapy
Treatment with bile or bile salts.
biliuria
The presence of various bile salts, or bile, in the urine. SYN: choleuria, choluria. [ bili- + G. ouron, urine]
biliverdin, biliverdine
A green bile pigment formed from the oxidation of heme; a bilin with a structure almost identical to that of bilirubin. SYN: dehydrobilirubin, verdine.
Bill
Arthur H., U.S. obstetrician, 1877–1961. See B. maneuver.
Billings
J.J., 20th century Australian gynecologist. See B. method.
Billroth
Christian A.T., Austrian surgeon, 1829–1894. See B. cords, under cord, B. operation I, B. operation II, B. venae cavernosae, under vena, B. I anastomosis, B. II anastomosis.
bilobate, bilobed
Having two lobes.
bilobectomy
Surgical excision of two lobes of the right lung, either right upper and middle or right lower and middle.
bilobular
Having two lobules.
bilocular, biloculate
Having two compartments or spaces. [bi- + L. loculus, dim. of locus, a place]
bimanual
Relating to, or performed by, both hands. [bi- + L. manus, hand]
bimastoid
Relating to both mastoid processes.
bimaxillary
Relating to both the right and left maxillae; sometimes used when describing something affecting both halves of the upper jaw.
bimodal
Denoting a frequency curve characterized by two peaks.
bimolecular
Involving two molecules, as in a b. reaction.
binangle
1. The second angle given the shank of an angled instrument to bring its working end close to the axis of the handle in order to prevent it from turning about the axis. 2. A ...
binary
1. Comprising two components, elements, molecules, etc. 2. Denoting a choice of two mutually exclusive outcomes for one event ( e.g., male or female, heads or tails, affected or ...
binaural
Relating to both ears. SYN: binotic. [L. bini, a pair, + auris, ear]
bind
1. To confine or encircle with a band or bandage. 2. To join together with a band or ligature. 3. To combine or unite molecules by means of reactive groups, either in the ...
binder
1. A broad bandage, especially one encircling the abdomen. 2. Anything that binds. See bind (3). - obstetrical b. a supporting garment covering the abdomen from the ribs to the ...
Binet
Alfred, French psychologist, 1857–1911. See B. age, B. scale, B. test, B.- Simon scale, Stanford-B. intelligence scale.
Bing
Paul Robert, German neurologist, 1878–1956. See B. reflex. Richard J., U.S. physician, *1909. See Taussig-B. disease, Taussig-B. syndrome.
Binge drinking
The dangerous practice of consuming large quantities of alcoholic beverages in a single session. Binge drinking carries a serious risk of harm, including alcohol poisoning. See ...
Binge eating disorder
An eating disorder characterized by periods of extreme over-eating, but not followed by purging behaviors as in most cases of bulimia. Binge eating can occur alone, or in ...
Bingham
Eugene C., U.S. chemist, 1878–1945. See B. flow, B. model, B. plastic.
binocular
Adapted to the use of both eyes; said of an optical instrument. [L. bini, paired, + oculus, eye]
Binocular vision
The ability to maintain visual focus on an object with both eyes, creating a single visual image. Lack of binocular vision is normal in infants. Adults without binocular vision ...
binomial
A set of two terms or names; in the probabilistic or statistical sense it corresponds to a Bernoulli trial. SEE ALSO: binary combination. [bi- + G. nomos, name]
binotic
SYN: binaural. [L. bini, a pair, + G. ous (ot-), ear]
Binswanger
Otto Ludwig, German neurologist, 1852–1929. See B. disease, B. encephalopathy.
Binswanger disease
A form of dementia with blood vessel abnormalities in the deep white-matter of the brain causing loss of memory, decreasing cognition, and mood changes. Patients usually show ...
binuclear, binucleate
Having two nuclei.
binucleolate
Having two nucleoli.
Bio-
Prefix indicating living plants or creatures, as in biology, the study of living organisms. * * * Combining form denoting life. [G. bios, life]
bioacoustics
The science dealing with the effects of sound fields or mechanical vibrations on living organisms.
bioactive
Referring to a substance that can be acted upon by a living organism or by an extract from a living organism.
bioassay
Determination of the potency or concentration of a compound by its effect upon animals, isolated tissues, or microorganisms, as compared with an analysis of its chemical or ...
bioastronautics
The study of the effects of space travel and space habitation on living organisms.
bioavailability
The physiological availability of a given amount of a drug, as distinct from its chemical potency; proportion of the administered dose which is absorbed into the bloodstream.
bioburden
Degree of microbial contamination or microbial load; the number of microorganisms contaminating an object.
biocatalyst
A substance of biologic origin that can catalyze a reaction; e.g., an enzyme.
biocenosis
An assemblage of species living in a particular biotope. SYN: biotic community. [ bio- + G. koinos, common]
Biochemical
Relating to biochemistry, the application of the tools and concepts of chemistry to living systems. Biochemists study such things as the structures and physical properties of ...
biochemistry
The chemistry of living organisms and of the chemical, molecular, and physical changes occurring therein. SYN: biologic chemistry, physiologic chemistry.
biochemorphic
Denoting the relationship between biologic action and chemical structure, as in food and drugs.
biochrome
SYN: natural pigment. [ bio- + G. chroma, color]
biocidal
Destructive of life; particularly pertaining to microorganisms. [ bio- + L. caedo, to kill]
bioclimatology
The science of the relationship of climatic factors to the distribution, numbers, and types of living organisms; an aspect of ecology.
biocompatibility
The relative ability of a material to interact favorably with a biological system. [ bio- + compatibility]
biocybernetics
The science of communication and control within a living organism, particularly on a molecular basis.
biocytin
ε-N-Biotinyl-l-lysine; biotin condensed through its carboxyl group with the ε-amino group of a lysyl residue in the apoenzymes to which biotin is the coenzyme; the ...
biocytinase
An enzyme in blood that catalyzes the hydrolysis of biocytin to biotin and lysine (or, lysyl residue if the lysine is in a protein).
biodegradable
Denoting a substance that can be chemically degraded or decomposed by natural effectors ( e.g., weather, soil bacteria, plants, animals).
biodegradation
SYN: biotransformation.
biodynamic
Relating to biodynamics.
biodynamics
The science dealing with the force or energy of living matter. [ bio- + G. dynamis, force]
bioecology
SYN: ecology.
bioelement
An element required by a living organism.
bioenergetics
1. The study of energy changes involved in the chemical reactions within living tissue. 2. The study of energy exchanges between living organisms and their environments.
bioengineering
See biomedical engineering.
Biofeedback
A method of treatment that uses monitors to feed back to patients physiological information of which they are normally unaware. By watching the monitor, patients can learn by ...
Biofilm
An aggregate of microbes with a distinct architecture. A biofilm is like a tiny city in which microbial cells, each only a micrometer or two long, form towers that can be ...
bioflavonoids
Naturally occurring flavone or coumarin derivatives commonly found in citrus fruits having the activity of the so-called vitamin P, notably rutin and esculin.
biogenesis
1. Term given by Huxley to the principle that life originates from preexisting life only and never from nonliving material. See spontaneous generation, recapitulation theory. ...
biogenetic
Relating to biogenesis.
biogenic
Produced by a living organism.
biogeochemistry
The study of the influence of living organisms and life processes on the chemical structure and history of the earth.
biogravics
That field of study dealing with the effect on living organisms (particularly humans) of abnormal gravitational effects produced, e.g., by acceleration or by free fall; in the ...
Bioinformatics
The analysis of biological information using computers and statistical techniques, the science of developing and utilizing computer databases and algorithms to accelerate and ...
bioinstrument
A sensor or device usually attached to or embedded in the human body or other living animal to record and to transmit physiologic data to a receiving and monitoring station.
biokinetics
The study of the growth changes and movements that developing organisms undergo. [ bio- + G. kinesis, motion]
Biologic evolution
Biologic evolution was contrasted with cultural (social) evolution in 1968 by A.G. Motulsky who pointed out that biologic evolution is mediated by genes, shows a slow rate of ...
biologic, biological
Relating to biology.
Biological response modifiers (BRMs)
: Substances that stimulate the body's response to infection and disease. The body naturally produces small amounts of these substances. Scientists can produce some of them in the ...
Biological therapy
: Treatment to stimulate or restore the ability of the immune (defense) system to fight infection and disease. Biological therapy is thus any form of treatment that uses the ...
biologist
A specialist or expert in biology.
biology
The science concerned with the phenomena of life and living organisms. [ bio- + G. logos, study] - cellular b. SYN: cytology. - molecular b. study of phenomena in terms of b. ...
bioluminescence
1. Light produced by certain organisms from the oxidation of luciferins through the action of luciferases and with negligible production of heat, chemical energy being ...
biolysis
Disintegration of organic matter through the chemical action of living organisms. [ bio- + G. lysis, dissolution]
biolytic
1. Relating to biolysis. 2. Capable of destroying life.
biomacromolecule
A naturally occurring substance of large molecular weight ( E.G., protein, DNA).
Biomarker
A biochemical feature or facet that can be used to measure the progress of disease or the effects of treatment.
biomass
The total weight of all living things in a given area, biotic community, species population, or habitat; a measure of total biotic productivity.
biomaterial
A synthetic or semisynthetic material used in a biological system to construct an implantable prosthesis and chosen for its biocompatibility. [ bio- + material]
biome
The total complex of biotic communities occupying and characterizing a particular geographic area or zone. [ bio- + -ome]
biomechanics
The science concerned with the action of forces, internal or external, on the living body. - dental b. SYN: dental biophysics.
biomedical
1. Pertaining to those aspects of the natural sciences, especially the biologic and physiologic sciences, that relate to or underlie medicine. 2. Biological and medical, i.e., ...
biomembrane
A structure bounding a cell or cell organelle; it contains lipids, proteins, glycolipids, steroids, etc. SYN: membrane (2).
biometer
A device for measuring carbon dioxide given off by organisms and, hence, for determining the quantity of living matter present. [ bio- + G. metron, measure]

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