| dalapon | <chemical> A herbicide that is used mainly to kill grasses, it was a major part of Agent Orange, a defoliant used in the Vietnam War. (09 Oct 1997) |
|---|---|
| Dale | Sir Henry Hallett, English physiologist and Nobel laureate, 1875-1968. See: Dale reaction, Dale-Feldberg law, Schultz-Dale reaction. (05 Mar 2000) |
| Dale reaction | The contraction of an excised intestinal loop (Schultz) or of an excised strip of virginal uterus (Dale) from a sensitised animal (guinea pig) which occurs when the tissue is exposed to the specific antigen. (05 Mar 2000) |
| Dale-Feldberg law | An identical chemical transmitter is liberated at all the functional terminals of a single neuron. (05 Mar 2000) |
| Dalen | Johan A., Swedish ophthalmologist, 1866-1940. See: Dalen-Fuchs nodules. (05 Mar 2000) |
| Dalen-Fuchs nodules | Collections of epithelial cells lying between Bruch's membrane and the retinal pigment epithelium in sympathetic ophthalmia and rarely in other granulomatous intraocular inflammations. (05 Mar 2000) |
| Dalgarno | Lynn, contemporary Australian molecular biologist. (05 Mar 2000) |
| dalmania | <paleontology> A genus of trilobites, of many species, common in the Upper Silurian and Devonian rocks. Origin: From Dalman, the geologist. Source: Websters Dictionary (01 Mar 1998) |
| dalmatian | Of or pertaining to Dalmatia. <zoology> Dalmatian dog, a carriage dog, shaped like a pointer, and having black or bluish spots on a white ground; the coach dog. Source: Websters Dictionary (01 Mar 1998) |
| dalmatic | 1. A vestment with wide sleeves, and with two stripes, worn at Mass by deacons, and by bishops at pontifical Mass; imitated from a dress originally worn in Dalmatia. 2. A robe worn on state ocasions, as by English kings at their coronation. Origin: LL. Dalmatica: cf. F. Dalmatique. Source: Websters Dictionary (01 Mar 1998) |
| Dalrymple | John, English oculist, 1804-1852. See: Dalrymple's sign. (05 Mar 2000) |
| Dalrymple's sign | <clinical sign> Retraction of the upper eyelid in Graves' disease, causing abnormal wideness of the palpebral fissure. (05 Mar 2000) |
| dalton | <unit> A unit of mass that equals the weight of a hydrogen atom, or 1.657 x10-24 grams. Named for John Dalton, an early nineteenth century British chemist who proposed the atomic theory of matter. (09 Oct 1997) |
| Dalton's law | Each gas in a mixture of gases exerts a pressure proportionate to the percentage of the gas and independent of the presence of the other gases present. Synonym: law of partial pressures. (05 Mar 2000) |
| Dalton, John | <person>English chemist, mathematician, and natural philosopher, 1766-1844. See: Dalton's law, Dalton-Henry law, daltonian, daltonism. (05 Mar 2000) |