| AHT | aggregation half time; antihyaluronidase titer; augmented histamine test; autogenous hamster tumor |
|---|---|
| BHL | bilateral hilar lymphadenopathy; biological half-life |
| EHL | effective half-life; electrohydraulic lipotripsy; endogenous hyperlipidemia; Environmental Health La... |
| FWHM | full width at half maximum |
| H1/2 | half-value layer |
| half-blooded | 1. Proceeding from a male and female of different breeds or races; having only one parent of good stock; as, a half-blooded sheep. 2. Degenerate; mean. Source: Websters Dictionary (01 Mar 1998) |
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| half-bred | 1. Half-blooded. 2. Imperfectly acquainted with the rules of good-breeding; not well trained. Source: Websters Dictionary (01 Mar 1998) |
| half-breed | A person who is blooded; the offspring of parents of different races, especially of the American Indian and the white race. See: Half-blooded. Source: Websters Dictionary (01 Mar 1998) |
| half-chair form | See: Haworth conformational formulas of cyclic sugars. (05 Mar 2000) |
| half cystine | Refers to one-half of a cystine molecule or of a cystinyl residue in a protein or peptide. (05 Mar 2000) |
| half-deck | 1. <zoology> A shell of the genus Crepidula; a boat shell. See Boat shell. 2. See Half deck, under Deck. Source: Websters Dictionary (01 Mar 1998) |
| half-fish | <zoology> A salmon in its fifth year of growth. Source: Websters Dictionary (01 Mar 1998) |
| half-glass spectacles | Spectacles, used for reading, in which the upper portion of the lenses are removed. Synonym: clerical spectacles, pantoscopic spectacles, pulpit spectacles. (05 Mar 2000) |
| half-hapten | A substance that elicits an antigen-antibody reaction, but no precipitation. (05 Mar 2000) |
| half-hearted | 1. Wanting in heart or spirit; ungenerous; unkind. 2. Lacking zeal or courage; lukewarm. (H. James) Source: Websters Dictionary (01 Mar 1998) |
| half-inferior | <plant biology> Of an ovary, partly below and partly above the level of attachment of the perianth and stamens. (13 Nov 1997) |
| half-life | 1. <pharmacology> The period over which the concentration of a specified chemical or drug takes to fall to half its original concentration in the specified fluid or blood. 2. <radiobiology> The time required to reduce the amount of a radionuclide to one-half the amount originally present. Physical or radioactive half-life refers to reduction of activity by radioactive decay, biological half-life refers to biological elimination from the body and effective half-life refers to the combined action of radioactive decay and biological elimination. (16 Dec 1997) |
| half-moon | 1. The moon at the quarters, when half its disk appears illuminated. 2. The shape of a half-moon; a crescent. "See how in warlike muster they appear, In rhombs, and wedges, and half-moons, and wings." (Milton) 3. An outwork composed of two faces, forming a salient angle whose gorge resembles a half-moon; now called a ravelin. 4. <zoology> A marine, sparoid, food fish of California (Caesiosoma Californiense). The body is ovate, blackish above, blue or gray below. Synonym: medialuna. Source: Websters Dictionary (01 Mar 1998) |
| half-ray | <geometry> A straight line considered as drawn from a center to an indefinite distance in one direction, the complete ray being the whole line drawn to an indefinite distance in both directions. Source: Websters Dictionary (01 Mar 1998) |
| half-reactions | <chemistry> The two parts of an oxidation-reduction reaction, one representing oxidation, the other reduction. (09 Jan 1998) |