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heparin

(Encyclopedia)heparin hĕpˈərĭn [key], anticoagulant produced by cells in many animals. A polysaccharide, heparin is found in the human body and occurs in greatest concentration in the tissues surrounding the ca...

Head Start

(Encyclopedia)Head Start, U.S. educational program for disadvantaged preschool children, established under the Economic Opportunity Act of 1964. Aimed initially only at poor children, its purpose was to organize pr...

Herophilus

(Encyclopedia)Herophilus hĭrŏfˈələs [key], fl. 300 b.c., Greek anatomist, called by some the father of scientific anatomy. A contemporary of Erasistratus at Alexandria, he made public dissections, comparing hu...

herpesvirus

(Encyclopedia)herpesvirus, any of the family (Herpesviridae) of common DNA-containing viruses, many of which are associated with human disease. See cytomegalovirus; Epstein-Barr virus; herpes simplex; herpes zoster...

Greenberg, Joseph Harold

(Encyclopedia)Greenberg, Joseph Harold, 1915–2001, American anthropological linguist, b. New York City, grad. Columbia (A.B., 1936) and Northwestern Univ. (Ph.D., 1940). He was a professor of anthropology at Colu...

Gobineau, Joseph Arthur, comte de

(Encyclopedia)Gobineau, Joseph Arthur, comte de zhôzĕfˈ ärtürˈ kôNt də gōbēnōˈ [key], 1816–82, French diplomat and man of letters. The chief early French proponent of the theory of Nordic supremacy, h...

Genovesi, Antonio

(Encyclopedia)Genovesi, Antonio äntôˈnyō jānōvĕˈzē [key], 1712–69, Italian philosopher and economist, a pioneer in writing philosophy in Italian instead of in Latin. Genovesi introduced new ideas, partic...

gargoyle

(Encyclopedia)CE5 Gargoyle gargoyle gärˈgoil [key], waterspout used in medieval Europe to draw rainwater from church and cathedral roofs. Gargoyles were fashioned imaginatively in the form of human grotesques...

Huitzilopochtli

(Encyclopedia)Huitzilopochtli wēˌtsēlōpōchtˈlē [key], chief deity of the Aztec, god of war. He is said to have guided the Aztecs during their migration from Aztlán. Usually represented in sculptured images ...

Couperus, Louis Marie Anne

(Encyclopedia)Couperus, Louis Marie Anne lwē märēˈ än ko͞opāˈro͝os [key], 1863–1923, Dutch novelist. In his early works he emphasized with graceful irony the determining forces of human history and envir...