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ivory

(Encyclopedia)ivory, type of dentin present only in the tusks of the elephant. Ivory historically has been obtained mainly from Africa, where elephant tusks are larger than they are in Asia, the second major source...

hermaphrodite

(Encyclopedia)hermaphrodite hərmăfˈrədītˌ [key], animal or plant that normally possesses both male and female reproductive systems, producing both eggs and sperm. Many plants, including most flowering plants ...

earthworm

(Encyclopedia)earthworm, terrestrial, cylindrical segmented worm of the class Oligochaeta. There are 2,200 earthworm species, found all over the world except in arid and arctic regions and ranging in size from 1 in...

Krasznahorkai, Lázló

(Encyclopedia)Krasznahorkai, Lázló, 1954–, Hungarian writer known for his strange, bleak, obsessive, and surreal novels, short stories, and film scripts. Usually marked by grim rural settings, and often featuri...

Melville, Herman

(Encyclopedia)Melville, Herman, 1819–91, American author, b. New York City, considered one of the great American writers and a major figure in world literature. Like Moby-Dick, Pierre; or, The Ambiguities (18...

fertility drug

(Encyclopedia)fertility drug, any of a variety of substances used to increase the possibility of conception and successful pregnancy. Different methods are used to correct or circumvent the many different functiona...

Cousteau, Jacques Yves

(Encyclopedia)Cousteau, Jacques Yves zhäk ēv ko͞ostōˈ [key], 1910–97, French oceanographer and naval officer. In 1943, with Émil Gagnan, he invented the self-contained underwater breathing apparatus (scuba)...

longevity

(Encyclopedia)longevity lŏnjĕvˈĭtē [key], term denoting the length or duration of the life of an animal or plant, often used to indicate an unusually long life. The average human life-span of threescore and te...

Zemurray, Samuel

(Encyclopedia)Zemurray, Samuel, 1877–1961, American business executive, b. Russia as Schmuel Zmuri; he Americanized his name early in the 20th cent. His nearly penniless family emigrated in 1891 and soon settled ...

basking shark

(Encyclopedia)basking shark, large, plankton-feeding shark, Cetorhinus maximus, inhabiting many oceans of the world, especially in temperate regions. Found singly or in schools of up to 100, it spends much of its t...