Columbia Encyclopedia

Search results

500 results found

tempering

(Encyclopedia)tempering, process involving slow and moderate heating to increase the hardness and toughness of metals that have undergone previous heat treatment. Metals are usually hardened (see hardening) by bein...

Brownian movement

(Encyclopedia)Brownian movement or motion, zigzag, irregular motion exhibited by minute particles of matter when suspended in a fluid. The effect has been observed in all types of colloidal suspensions (see colloid...

caviar

(Encyclopedia)caviar or caviare kăvˈēär [key], the roe (eggs) of various species of sturgeon prepared as a piquant table delicacy. The ovaries of the fish are beaten to loosen the eggs, which are then freed fro...

Cayuse

(Encyclopedia)Cayuse kīyo͞osˈ [key], Native North Americans who formerly occupied parts of NE Oregon and SE Washington. They were closely associated with the Nez Percé and spoke a language belonging to the Saha...

bobolink

(Encyclopedia)bobolink bŏbˈəlĭngkˌ [key], common name in the N United States and Canada for an American songbird, Dolichonyx oryzivorus, related to the blackbird and the oriole, belonging to the family Icterid...

West, Nathanael

(Encyclopedia)West, Nathanael, 1903–40, American novelist, whose real name was Nathan Weinstein, b. New York City, grad. Brown Univ., 1924. An innovative, highly original author, West revealed the sterility and g...

postmodernism

(Encyclopedia)postmodernism, term used to designate a multitude of trends—in the arts, philosophy, religion, technology, and many other areas—that come after and deviate from the many 20th-cent. movements that ...

pigmentation

(Encyclopedia)pigmentation, name for the coloring matter found in certain plant and animal cells and for the color produced thereby. Pigmentation occurs in nearly all living organisms. Almost all plants synthesize ...

kudu

(Encyclopedia)kudu ko͞oˈdo͞o [key], either of two oshort-haired African antelopes of genus Tragelaphus. The greater kudu, T. strepsiceros, has a reddish brown coat with thin vertical white stripes on its sides. ...