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Nilsson, Lennart

(Encyclopedia) Nilsson, LennartNilsson, Lennartlĕnˈnärt nĭlˈsôn [key], 1922–2017, Swedish photographer who made pioneering microphotographs of embryos and the human body. Nilsson began his career as…

nitroglycerin

(Encyclopedia) nitroglycerinnitroglycerinnīˌtrōglĭsˈərĭn [key], C3H5N3O9, colorless, oily, highly explosive liquid. It is the nitric acid triester of glycerol and is more correctly called glycerol…

nail, in anatomy

(Encyclopedia) nail, in anatomy, the horny outgrowth shielding the tip of the finger and the toe in humans and most other primates. The nail consists of dead cells pushed outward by dividing cells in…

Ignarro, Louis Joseph

(Encyclopedia) Ignarro, Louis Joseph, 1941–. American pharmacologist, b. Brooklyn, N.Y., Ph.D. Univ. of Minnesota, 1966. He was on the faculty at Tulane Univ. from 1979 to 1985, when he became a…

laminitis

(Encyclopedia) laminitislaminitislămˌənīˈtĭs [key], also called founder, inflammation of the lamina, the innermost layer of the hoof wall in horses, ponies, and donkeys. Although the condition…

arapaima

(Encyclopedia) arapaimaarapaimaărˌəpīˈmə [key], tropical fish, genus Arapaima, of the Amazon basin. Arapaimas are perhaps the largest of the strictly freshwater fishes, reportedly reaching a length…

chloramphenicol

(Encyclopedia) chloramphenicolchloramphenicolklōrˌămfĕnˈəkŏlˌ [key], antibiotic effective against a wide range of gram-negative and gram-positive bacteria (see Gram's stain). It was originally…

histamine

(Encyclopedia) histaminehistaminehĭsˈtəmēnˌ [key], organic compound derived in the body from the amino acid histidine by the removal of a carboxyl group (COOH). Although found in many plant and…

glycogen

(Encyclopedia) glycogenglycogenglīˈkəjən [key], starchlike polysaccharide (see carbohydrate) that is found in the liver and muscles of humans and the higher animals and in the cells of the lower…

Jarrell, Randall

(Encyclopedia) Jarrell, RandallJarrell, Randalljərĕlˈ [key], 1914–65, American poet and critic, b. Nashville, Tenn., grad. Vanderbilt Univ. (B.A., 1935; M.A., 1938). His poetry, reflecting an…