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Greengard, Paul

(Encyclopedia)Greengard, Paul, 1925–2019, American neuroscientist, b. New York City, Ph.D. Johns Hopkins, 1953. Greengard was on the staff at Geigy Research Laboratories (1959–67) and a professor at the Albert ...

Hurwicz, Leonid

(Encyclopedia)Hurwicz, Leonid hûrˈwĭch [key], 1917–2008, Polish-American economist and statistician, b. Russia., grad. Univ. of Warsaw, 1938. Educated in the law, he subsequently studied economics in London, G...

tourmaline

(Encyclopedia)tourmaline to͝orˈməlĭn, –lēn [key], complex borosilicate mineral with varying amounts of aluminum, iron, magnesium, sodium, lithium, potassium, and sometimes other elements, used as a gem. It o...

lionfish

(Encyclopedia)lionfish, common name for a genus (Pterois) of the family Scorpaenidae (see rockfish), comprising venomous subtropical marine fish native to the South Pacific, the Indian Ocean, and the Red Sea. Nativ...

Fort Garry

(Encyclopedia)Fort Garry, two trading posts of the Hudson's Bay Company, built on the present-day site of Winnipeg, Man., Canada, at the confluence of the Red and Assiniboine rivers. The first, Upper Fort Garry, wa...

Rh factor

(Encyclopedia)Rh factor, protein substance present in the red blood cells of most people, capable of inducing intense antigenic reactions. The Rh, or rhesus, factor was discovered in 1940 by K. Landsteiner and A. S...

polycythemia

(Encyclopedia)polycythemia pŏlˌēsīthēˈmēə [key], condition characterized by an increase in the production of red blood cells, or erythrocytes, in the blood. Primary polycythemia, also called erythremia, or ...

garnet

(Encyclopedia)garnet, name applied to a group of isomorphic minerals crystallizing in the cubic system. They are used chiefly as gems and as abrasives (as in garnet paper). The garnets are double silicates; one of ...

Irish terrier

(Encyclopedia)Irish terrier, a breed of hardy working terrier developed in the British Isles and believed to be one of the oldest terriers. It stands about 18 in. (46 cm) high at the shoulder and weighs from 25 to ...

Egyptians, Gospel of the

(Encyclopedia)Egyptians, Gospel of the: see Pseudepigrapha. ...