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lancelet

(Encyclopedia)lancelet, name for small, fishlike lower chordate (see Chordata), also called amphioxus; it shows many affinities with the vertebrates. There are about 30 lancelet species, most belonging to the genus...

rhythm, biological

(Encyclopedia)rhythm, biological, or biorhythm, cyclic pattern of physiological changes or changes in activity in living organisms, most often synchronized with daily, monthly, or annual cyclical changes in the env...

deafness

(Encyclopedia)deafness, partial or total lack of hearing. It may be present at birth (congenital) or may be acquired at any age thereafter. A person who cannot detect sound at an amplitude of 20 decibels in a frequ...

Oe, Kenzaburo

(Encyclopedia)Oe, Kenzaburo kĕnˌzäbo͝orˈō ōˈā [key], 1935–2023, Japanese writer, b. Ose,...

phenothiazine

(Encyclopedia)phenothiazine fēˌnəthīˈəzĭn [key], any one of a class of drugs used to control mental disorders. Phenothiazines, along with other antipsychotic, or neuroleptic, drugs are used for such disorder...

whooping cough

(Encyclopedia)whooping cough or pertussis, highly communicable infectious disease caused by the bacterium Bordetella pertussis. The early or catarrhal stage of whooping cough is manifested by the usual symptoms of ...

rabies

(Encyclopedia)rabies hīˌdrəfōˈbēə [key], acute viral infection of the central nervous system in dogs, bats, foxes, raccoons, skunks, and other animals, and in humans. The virus is transmitted from an animal ...

Rove, Karl Christian

(Encyclopedia)Rove, Karl Christian, 1950–, U.S. political consultant and government official, b. Denver, Colo. Politically active in high school, he joined College Republicans while at the Univ. of Utah and becam...

skull

(Encyclopedia)CE5 Bones of skull skull, the skeletal structure of the head, composed of the facial and cranial bones. The skull houses and protects the brain and most of the chief sense organs; i.e., the eyes, ...

shock

(Encyclopedia)shock, any condition in which the circulatory system is unable to provide adequate circulation to the body tissues, also called circulatory failure or circulatory collapse. Shock results in the slowin...