| Arndt's law | An obsolete law stating that weak stimuli excite physiologic activity, moderately strong ones favour it, strong ones retard it, and very strong ones arrest it. (05 Mar 2000) |
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| Arndt, G | <person> German physician, 1874--1929. See: Arndt-Gottron syndrome. (05 Mar 2000) |
| Arndt, Rudolph | <person> German psychiatrist, 1835-1900. See: Arndt's law. (05 Mar 2000) |
| Arndt-Gottron syndrome | Generalised lichen myxoedematosus with diffuse thickening of the skin underlying the papules. Synonym: Arndt-Gottron syndrome. (05 Mar 2000) |
| arnee | <zoology> The wild buffalo of India (Bos, or Bubalus, arni), larger than the domestic buffalo and having enormous horns. Source: Websters Dictionary (01 Mar 1998) |
| Arneth classification | A classification of the polymorphonuclear neutrophils according to the number of their nuclear lobes. See: Arneth stages. (05 Mar 2000) |
| Arneth count | The percentage distribution of polymorphonuclear neutrophils, based on the number of lobes in the nuclei (from 1 to 5). See: Arneth index. (05 Mar 2000) |
| Arneth formula | The normal, approximate ratio of polymorphonuclear neutrophils, based on the number of lobes in the nuclei, as follows: 1 lobe, 5%; 2 lobes, 35%; 3 lobes, 41%; 4 lobes, 17%; 5 lobes, 2%. (05 Mar 2000) |
| Arneth index | An expression based on adding the percentages of polymorphonuclear neutrophils with 1 or 2 lobes in their nuclei, plus one-half the percentage with 3 lobes; the normal value is 60%. See: Arneth formula, Arneth count. (05 Mar 2000) |
| Arneth stages | A differential grouping of polymorphonuclear neutrophils in accordance with the number of lobes in their nuclei, i.e., cells with 1, 2, 3, 4, or 5 (or more) lobes are designated, respectively, as class I, II, and so on. See: Arneth formula. (05 Mar 2000) |
| Arneth, Joseph | <person> German physician, 1873-1955. See: Arneth classification, Arneth count, Arneth formula, Arneth index, Arneth stages. (05 Mar 2000) |
| arnica | <botany> A genus of plants; also, the most important species (Arnica montana), native of the mountains of Europe, used in medicine as a narcotic and stimulant. The tincture of arnica is applied externally as a remedy for bruises, sprains, etc. Origin: Prob. A corruption of ptarmica. Source: Websters Dictionary (01 Mar 1998) |
| arnicin | <chemistry> An active principle of Arnica montana. It is a bitter resin. See: Arnica. Source: Websters Dictionary (01 Mar 1998) |
| arnicine | <chemistry> An alkaloid obtained from the arnica plant. Source: Websters Dictionary (01 Mar 1998) |
| Arnold's bodies | Small portions or minute fragments of erythrocytes (sometimes mistaken for blood platelets), or small "ghosts" of erythrocytes. (05 Mar 2000) |