Columbia Encyclopedia

Search results

500 results found

Van de Graaff, Robert Jemison

(Encyclopedia)Van de Graaff, Robert Jemison văn də gräf [key], 1901–67, American physicist, b. Tuscaloosa, Ala., grad. Univ. of Alabama (B.S., 1922), Ph.D. Oxford, 1928. He was research associate at Massachuse...

stickleback

(Encyclopedia)stickleback, common name for members of the family Gasterosteidae, small fishes, widely distributed in both fresh- and saltwaters of the Northern Hemisphere. Sticklebacks range from 11⁄2 to 4 in. (3...

chariot

(Encyclopedia)chariot, earliest and simplest type of carriage and the chief vehicle of many ancient peoples. The chariot was known among the Babylonians before the introduction of horses c.2000 b.c. and was first d...

Mílos, island, Greece

(Encyclopedia)Mílos mēˈlō, mīˈ– [key], mountainous island (1991 pop. 4,390), 58 sq mi (150 sq km), SE Greece, in the Aegean Sea; one of the Cyclades. The main town is Mílos, formerly known as Plaka. The is...

Maxim

(Encyclopedia)Maxim măkˈsĭm [key], name of a family of inventors and munition makers. Sir Hiram Stevens Maxim, 1840–1916, was born near Sangerville, Maine. After launching on a career of inventing, he moved to...

parity

(Encyclopedia)parity or space parity, in physics, quantity that refers to the relationship between an object or process and the image that it can produce in a mirror. For example, any right-handed object will produ...

Rowhani, Hassan

(Encyclopedia)Rowhani, Hassan häsänˈ rōhänēˈ [key], 1948–, Iranian cleric and political leader, b. Sorkheh, ...

gadolinium

(Encyclopedia)gadolinium gădəlĭnˈēəm [key], metallic chemical element; symbol Gd; at. no. 64; at. wt. 157.25; m.p. 1,312℃; b.p. 3,233℃; sp. gr. 7.898 at 25℃; valence +3. Gadolinium is a malleable, ducti...

deer

(Encyclopedia)deer, ruminant mammal of the family Cervidae, found in most parts of the world except Australia. Antlers, solid bony outgrowths of the skull, develop in the males of most species and are shed and rene...

poison gas

(Encyclopedia)poison gas, any of various gases sometimes used in warfare or riot control because of their poisonous or corrosive nature. These gases may be roughly grouped according to the portal of entry into the ...