Columbia Encyclopedia

Search results

500 results found

boiler

(Encyclopedia)boiler, device for generating steam. It consists of two principal parts: the furnace, which provides heat, usually by burning a fuel, and the boiler proper, a device in which the heat changes water in...

Goering, Hermann Wilhelm

(Encyclopedia)Goering or Göring, Hermann Wilhelm both: hĕrˈmän vĭlˈhĕlm göˈrĭng [key], 1893–1946, German National Socialist leader. In World War I he was a hero of the German air force. An early member ...

snorkel

(Encyclopedia)snorkel, tube through which a submarine or diver can draw air while underwater. When in use, the top of the snorkel tube extends above the water surface into the air. The first snorkels were probably ...

polonium

(Encyclopedia)polonium pəlōˈnēəm [key], radioactive chemical element; symbol Po; at. no. 84; mass no. of most stable isotope 209; m.p. 254℃; b.p. 962℃; sp. gr. about 9.4; valence +2 or +4. Polonium is an e...

Austin

(Encyclopedia)Austin. 1 City, seat of Mower co., SE Minn., on the Cedar River, near the Iowa line; inc. 1868. The commercial and industrial center of a rich farm region, it is noted as home to the ...

servomechanism

(Encyclopedia)servomechanism, automatic device for the control of a large power output by means of a small power input or for maintaining correct operating conditions in a mechanism. It is a type of feedback contro...

Colorado Springs

(Encyclopedia)Colorado Springs, city (2020 pop. 478,961), seat of El Paso co., central Colo., on Monument and Fountain creeks, at the foot of Pikes Peak; inc. ...

Scowcroft, Brent

(Encyclopedia)Scowcroft, Brent, 1925–2020, U.S. air force general and government official, b. Ogden, Utah, B.S. United States Military Academy, 1947, Ph.D. Columbia, 1967. From 1947 to 1975, he served in the U.S....

peroxide

(Encyclopedia)peroxide pərŏkˈsīd [key], chemical compound containing two oxygen atoms, each of which is bonded to the other and to a radical or some element other than oxygen; e.g., in hydrogen peroxide, H2O2, ...

Fort Lauderdale

(Encyclopedia)Fort Lauderdale lôˈdərdāl [key], residential, commercial, and resort city (2020 pop. 182,760), seat ...