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pineapple

(Encyclopedia)pineapple, common name for one member of and for the Bromeliaceae, a family of chiefly epiphytic herbs and small shrubs native to the American tropics and subtropics. The spiny leaves of various speci...

pacemaker, artificial

(Encyclopedia)pacemaker, artificial, device used to stimulate a rhythmic heartbeat by means of electrical impulses. Implanted in the body when the heart's own electrical conduction system (natural pacemaker) does n...

corticosteroid drug

(Encyclopedia)corticosteroid drug kôrˌtəkōstârˈoid [key], any one of several synthetic or naturally occurring substances with the general chemical structure of steroids. They are used therapeutically to mimic...

fluke

(Encyclopedia)fluke, parasitic flatworm of the trematoda class, related to the tapeworm. Instead of the cilia, external sense organs, and epidermis of the free-living flatworms, adult flukes have sucking disks with...

poison

(Encyclopedia)poison, any agent that may produce chemically an injurious or deadly effect when introduced into the body in sufficient quantity. Some poisons can be deadly in minute quantities, others only if relati...

caterpillar

(Encyclopedia)caterpillar kătˈəpĭlˌər, kătˈər– [key], common name for the larva of a moth or butterfly. Caterpillars have distinct heads and are segmented and wormlike. They have three pairs of short, jo...

transplantation, medical

(Encyclopedia)transplantation, medical, surgical procedure by which a tissue or organ is removed and replaced by a corresponding part, usually from another part of the body or from another individual. A life-saving...

Dickinson, Peter

(Encyclopedia)Dickinson, Peter (Peter Malcolm de Brissac Dickinson), 1927–2015, b. Livingstone, Northern Rhodesia (now Zambia). The son of a civil servant, he returned to England (1935) with his family and attend...

Allison, James Patrick

(Encyclopedia)Allison, James Patrick, 1948–, American immunologist, b. Alice, Tex., Ph.D. Univ. of Texas, Austin, 1973. Allison was a researcher at the Univ. of Texas System Cancer Center in Houston from 1977 to ...

histamine

(Encyclopedia)histamine hĭsˈtəmēnˌ [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 animal tissues, histamin...