| Haldane's evolutionary unit | <unit> A unit of measurement, given in darwins, which measures the increase in body size of a chronospecies over evolutionary time. (13 Nov 1997) |
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| Haldane's rule | <genetics> if one of the two sexes is missing, sterile, or rare in a population of first-generation hybrids between two different species, then that sex is the heterogametic sex (has two different sex chromosomes, such as XY as opposed to XX). (09 Oct 1997) |
| Haldane, John B S | <person> English biochemist and geneticist, who wrote many works of popular science. Lived: 1892-1964. See: Haldane relationship. (05 Mar 2000) |
| Haldane, John S | <person> Scottish physiologist at Oxford. Lived: 1860-1936. See: Haldane's apparatus, Haldane chamber, Haldane effect, Haldane transformation, Haldane tube, Haldane-Priestley sample. (05 Mar 2000) |
| Haldane-Priestley sample | <physiology> An approximation of alveolar gas obtained from the end of a sudden maximal expiration into a Haldane tube. (05 Mar 2000) |
| Hale's colloidal iron stain | <technique> A stain used to distinguish acid mucopolysaccharides such as hyaluronic acid; may be combined with PAS to also visualise carbohydrate-containing proteins and glycoproteins. (05 Mar 2000) |
| Hales' piesimeter | A glass tube inserted into an artery at right angles to its axis, the pressure being shown by the height to which the blood ascends in the tube. (05 Mar 2000) |
| Hales, Stephen | <person> English physiologist, 1677-1761. See: Hales' piesimeter. (05 Mar 2000) |
| halesia | <botany> A genus of American shrubs containing several species, called snowdrop trees, or silver-bell trees. They have showy, white flowers, drooping on slender pedicels. Source: Websters Dictionary (01 Mar 1998) |
| halethazole | 5-Chloro-2-[p-(diethylaminoethoxy)phenyl]benzothiazole;an antiseptic with antifungal properties. (05 Mar 2000) |
| half | In an equal part or degree; in some pa appromating a half; partially; imperfectly; as, half-coloured, half done, half-hearted, half persuaded, half conscious. "Half loth and half consenting." "Their children spoke halfin the speech of Ashdod." (Neh. Xiii. 24) 1. Consisting of a moiety, or half; as, a half bushel; a half hour; a half dollar; a half view. The adjective and noun are often united to form a compound. 2. Consisting of some indefinite portion resembling a half; approximately a half, whether more or less; partial; imperfect; as, a half dream; half knowledge. "Assumed from thence a half consent." (Tennyson) Half ape, a middle or intermediate tint, as in drawing or painting. See Demitint. Half truth, a statement only partially true, or which gives only a part of the truth. Half year, the space of six moths; one term of a school when there are two terms in a year. Origin: AS. Healf, half, half; as a noun, half, side, part; akin to OS, OFries, & D. Half, G. Halb, Sw. Half, Dan. Halv, Icel. Halfr, Goth. Halbs. Cf. Halve, Behalf. Source: Websters Dictionary (01 Mar 1998) |
| half amplitude pulse duration | The time, in milliseconds, required for a wave form to reach half of its full magnitude. (05 Mar 2000) |
| half and half nail | Division of the nail by a transverse line into a proximal dull white part and a distal pink or brown part; seen in uraemia. (05 Mar 2000) |
| half axial view | Reverse tilted AP radiographic projection devised to permit demonstration of the entire occipital bone, foramen magnum, and dorsum sellae, as well as the petrous ridges. Synonym: half axial view, half-axial projection, Towne view. (05 Mar 2000) |
| half blood | 1. The relation between persons born of the same father or of the same mother, but not of both; as, a brother or sister of the half blood. See Blood, 2 and 4. 2. A person so related to another. 3. A person whose father and mother are of different races; a half-breed. In the 2d and 3d senses usually with a hyphen. Source: Websters Dictionary (01 Mar 1998) |