Columbia Encyclopedia

Search results

500 results found

rainmaking

(Encyclopedia)rainmaking, production of rain by artificial means now generally disregarded, though it is probable that rainmaking hastens or increases rainfall from clouds suitable for natural rainfall. Interest in...

thunderstorm

(Encyclopedia)thunderstorm, violent, local atmospheric disturbance accompanied by lightning, thunder, and heavy rain, often by strong gusts of wind, and sometimes by hail. The typical thunderstorm caused by convect...

waterspout

(Encyclopedia)waterspout, tornado occurring at sea or over inland waters. The characteristic funnel-shaped cloud is formed at the base of a cumulus-type cloud and extends downward to the water surface, where it pic...

Oort, Jan Hendrik

(Encyclopedia)Oort, Jan Hendrik ōrt [key], 1900–1992, Dutch astronomer. He confirmed (1927) Bertil Lindblad's theory of the Milky Way galaxy's rotation. In the 1950s he and his colleagues used radio astronomical...

International Committee of the Red Cross

(Encyclopedia)International Committee of the Red Cross: see Red Cross. ...

Red River, river, China and Vietnam

(Encyclopedia)Red River, Chinese Yuan Chiang, Vietnamese Song Hong, chief river of N Vietnam, 730 mi (1,175 km) long, rising in Yunnan prov., S China, and flowing southeast, in deep, narrow gorges, through N Vietna...

Bighorn Mountains

(Encyclopedia)Bighorn Mountains, range of the Rocky Mts., N central Wyo., extending c.120 mi (190 km) N into S Montana, E of the Bighorn River. Cloud Peak, 13,165 ft (4,013 m), is the highest point. The glaciated m...

ceilometer

(Encyclopedia)ceilometer sēlŏmˈĭtər [key], in aviation and meteorology, automatic instrument used to record ceiling, i.e., the altitude of the lowest cloud layer covering more than half of the sky. The ceilome...

Crazy Horse

(Encyclopedia)Crazy Horse, d. 1877, war chief of the Oglala Sioux. He was a prominent leader in the Sioux resistance to white encroachment in the mineral-rich Black Hills. When Crazy Horse and his people refused to...

Kalidasa

(Encyclopedia)Kalidasa käˌlĭdäˈsə [key], fl. 5th cent.?, Indian dramatist and poet. He is regarded as the greatest figure in classical Sanskrit literature. Except that he was retained by the Gupta court, no f...