Columbia Encyclopedia

Search results

500 results found

hydrophone

(Encyclopedia)hydrophone hīˈdrəfōnˌ [key], device that receives underwater sound waves and converts them to electrical energy; the voltage generated can then be read on a meter or played through a loudspeaker....

Hyatt, Alpheus

(Encyclopedia)Hyatt, Alpheus, 1838–1902, American zoologist, b. Washington, D.C., grad. Harvard, 1862. He was a devoted follower of Louis Agassiz. From 1870, Hyatt was custodian and later curator of the Boston So...

River Rouge

(Encyclopedia)River Rouge ro͞ozh [key], city (1990 pop. 11,314), Wayne co., SE Mich., an industrial suburb of Detroit, on the Detroit and Rouge rivers; settled c.1817, inc. 1899. It is a port of entry, with automo...

Whyte, William Hollingsworth

(Encyclopedia)Whyte, William Hollingsworth, 1917–99, b. West Chester, Pa. He graduated from Princeton (1939), then served in the Marine Corps (1941–45). Writing for Fortune magazine (1946–58), he developed a ...

sea fan

(Encyclopedia)sea fan, colonial marine animal forming erect, flattened, branching colonies in tropical and subtropical waters. Colonies may be several feet high and are often colorful, with purples, reds, and yello...

Richards, William Trost

(Encyclopedia)Richards, William Trost, 1833–1905, American painter, b. Philadelphia, studied in Florence, Rome, and Paris, and settled in Germantown, Pa. Early in his career he painted landscapes and still lifes,...

Driesch, Hans Adolf Eduard

(Encyclopedia)Driesch, Hans Adolf Eduard häns äˈdôlf āˈdo͞oärt drēsh [key], 1867–1941, German philosopher, b. Bad Kreuznach, grad. (zoology) Univ. of Jena, 1889. His early interest in biology was gradual...

Dubochet, Jacques

(Encyclopedia)Dubochet, Jacques, 1942–, Swiss biophysicist and molecular biologist, Ph.D., Univ. of Geneva 1973. Dubochet was a researcher at the European Molecular Biology Laboratory in Heidelberg from 1978 to 1...

endoderm

(Encyclopedia)endoderm ĕnˈdədûrmˌ [key], in biology, inner layer of tissue formed in the gastrula stage of the developing embryo. At the end of the blastula stage, cells of the embryo are arranged in the form ...

homology

(Encyclopedia)CE5 Homology in bones of a bird wing and an amphibian foreleg homology hōmŏlˈəjē [key], in biology, the correspondence between structures of different species that is attributable to their ev...