Columbia Encyclopedia

Search results

303 results found

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...

trade winds

(Encyclopedia)trade winds, movement of air toward the equator, from the NE in the Northern Hemisphere and from the SE in the Southern Hemisphere. The trade winds originate on the equatorial sides of the horse latit...

Vanloo

(Encyclopedia)Vanloo väNlōˈ, vänlōˈ [key], family of French painters of Dutch origin. Jacob or Jacques Vanloo, 1614–70, b. Holland, went to Paris in 1662, where he had great success as a portrait painter. H...

radiochemistry

(Encyclopedia)radiochemistry, chemistry of radioactive substances (see radioactivity). Radioactive isotopes are very useful as tracers to study the mechanisms of complex organic reactions, since even minute amounts...

Orbiting Solar Observatory

(Encyclopedia)Orbiting Solar Observatory (OSO), series of eight orbiting observatories (see observatory, orbiting) launched between 1962 and 1971 by the National Aeronautics and Space Administration (NASA) to study...

Kennedy, William

(Encyclopedia)Kennedy, William, 1928–, American novelist, b. Albany, N.Y., grad. Siena College, 1949. Brought up in Albany, he worked as a journalist from 1949 to 1970, and began to concentrate on writing fiction...

Pérez Galdós, Benito

(Encyclopedia)Pérez Galdós, Benito bānēˈtō pāˈrĕth gäldōsˈ [key], 1843–1920, Spanish novelist and dramatist, b. Canary Islands. At 20 he went to Madrid, where he spent most of his adult life. For his ...

phylloxera

(Encyclopedia)phylloxera fĭlŏkˈsĭrə [key], small, sap-eating, greenish insect of the genus Phylloxera, closely related to the aphid. Phylloxeras feed on leaves and roots, and many species produce galls on deci...

Carnot, Nicolas Léonard Sadi

(Encyclopedia)Carnot, Nicolas Léonard Sadi kärnōˈ [key], 1796–1832, French physicist, a founder of modern thermodynamics; son of Lazare N. M. Carnot. His famous work on the motive power of heat (Réflexions ...

Castagno, Andrea del

(Encyclopedia)Castagno, Andrea del ändrĕˈä dĕl kästäˈnyō [key], c.1423–1457, major Florentine painter of the early Renaissance. His first recorded painting (1440; now destroyed), effigies of hanged men, ...