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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...

Dreiser, Theodore

(Encyclopedia)Dreiser, Theodore drīˈsər, –zər [key], 1871–1945, American novelist, b. Terre Haute, Ind. A pioneer of naturalism in American literature, Dreiser wrote novels reflecting his mechanistic view o...

Zika virus

(Encyclopedia)Zika virus zēˈkə [key], single-stranded RNA virus of the genus flavivirus that infects human and primates and causes a disease known as Zika fever or zika. It is primarily transmitted by the bite o...

Collins, Patricia Hill

(Encyclopedia)Collins, Patricia Hill, 1948–, American sociologist and social theorist, b. Philadelphia, Ph.D. Brandeis University, 1984. A noted ...

Updike, John

(Encyclopedia)Updike, John, 1932–2009, American author, one of the nation's most distinguished 20th-century men of letters, b. Shillington, Pa., grad. Harvard, 1954. In his many novels and stories, written in a w...

hepatitis

(Encyclopedia)hepatitis hĕpˌətīˈtĭs [key], inflammation of the liver. There are many types of hepatitis. Causes include viruses, toxic chemicals, alcohol consumption, parasites and bacteria, and certain drugs...

heredity

(Encyclopedia)heredity, transmission from generation to generation through the process of reproduction in plants and animals of factors which cause the offspring to resemble their parents. That like begets like has...

infection

(Encyclopedia)infection, invasion of plant or animal tissues by microorganisms, i.e., bacteria, viruses, viroids, fungi, rickettsias, and protozoans. The invasion of body tissues by parasitic worms and other higher...

Singer, Isaac Bashevis

(Encyclopedia)Singer, Isaac Bashevis bäshĕvˈĭs [key], 1904–91, American novelist and short-story writer in the Yiddish language, younger brother of I. J. Singer, b. Leoncin, Poland (then in Russia). The son o...

aggression

(Encyclopedia)aggression, a form of behavior characterized by physical or verbal attack. It may appear either appropriate and self-protective, even constructive, as in healthy self-assertiveness, or inappropriate a...