Columbia Encyclopedia

(Encyclopedia) gynecology gīnˌəkŏlˈəjē [key], branch of medicine specializing in the disorders of the female reproductive system. Modern gynecology deals with menstrual disorders, menopause, infectious diseas...

(Encyclopedia) Medill, Joseph mədĭlˈ [key], 1823–99, American journalist, b. near St. John, N.B., Canada. His family moved to a farm near Massillon, Ohio, in 1832. He was admitted to the bar in 1846, but in 184...

(Encyclopedia) cortisol kôrˈtĭsôlˌ [key] or hydrocortisone, steroid hormone that in humans is the major circulating hormone of the cortex, or outer layer, of the adrenal gland. Like cortisone, cortisol is class...

(Encyclopedia) quarrying, open, or surface, excavation of rock used for various purposes, including construction, ornamentation, road building, and as an industrial raw material. Rock that has been quarried is commo...

(Encyclopedia) Sarawak səräˈwäk [key], state (1991 pop. 1,648,217), 48,342 sq mi (125,206 sq km), Malaysia, in NW Borneo and on the South China Sea. It is bordered on the NE by the states of Brunei and Sabah and...

(Encyclopedia) Victoria (Alexandrina Victoria) ălˌĭgzăndrēˈnə [key], 1819–1901, queen of Great Britain and Ireland (1837–1901) and empress of India (1876–1901). She was the daughter of Edward, duke of K...

(Encyclopedia) Nu, U o͞o no͞o [key], 1907–95, Burmese political leader, prime minister of Burma (1948–56, 1957–58, 1960–62). A nationalist, he was expelled by the British authorities from the Univ. of Rang...

(Encyclopedia) diphtheria dĭfthērˈēə [key], acute contagious disease caused by Corynebacterium diphtheriae (Klebs-Loffler bacillus) bacteria that have been infected by a bacteriophage. It begins as a soreness o...

(Encyclopedia) Carboniferous period kärbənĭfˈərəs [key], fifth period of the Paleozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), from 350 to 290 million years ago. The pl...

(Encyclopedia) aircraft carrier, ship designed to carry aircraft and to permit takeoff and landing of planes. The carrier's distinctive features are a upper deck (flight deck) that is flat and sometimes sloped to fu...