|
differentiation
differentiation in biology, series of changes that occur in cells and tissues during development, resulting in their specialization. This, in turn, permits a greater variety of organisms. In plants, unspecialized cells, composing tissue called meristem , differentiate into vascular tissue (xylem a...
Read more
|
|
|
pediatrics
pediatrics , branch of medicine dedicated to the attainment of the best physical, emotional, and social health for infants, children, and young people generally. Pediatrics became a specialty in 1930 when the American Academy of Pediatrics was founded with the idea that children have special develop...
Read more
|
|
|
Philip Charles Habib
Philip Charles Habib , 1920-92, American diplomat, b. New York City. A career foreign service officer (1949-80), he served in various embassy and State Dept. posts. Habib took part in negotiations that led to the Paris peace accords with North Vietnam and the Camp David accords , and was ambassador...
Read more
|
|
|
Isaac Shelby
Isaac Shelby 1750-1826, American frontiersman, b. Washington co. (then part of Frederick co.), Md. Around 1773 he settled in the Holston River country in what is now E Tennessee. In the American Revolution he was one of the frontier leaders who defeated the British at Kings Mt. (1780) in the Carol...
Read more
|
|
flying fish
flying fish common name for members of the Exocoetidae, a family of carnivorous or herbivorous fish of warmer seas. Flying fishes usually swim in schools. They average 7 to 12 in. (17.5-30 cm) in length and have pectoral fins that compare in size with the wings of birds; in some species the pelvic ...
Read more
|
|
|
William Travers Jerome
William Travers Jerome 1859-1934, American lawyer, b. New York City. Prominent in the cause of reform, he served (1894-95) on the Lexow commission to investigate political corruption and managed (1894) the successful campaign of William L. Strong for reform mayor of New York City. He helped frame t...
Read more
|
|
|
Mordecai Manuel Noah
Mordecai Manuel Noah , 1785-1851, American journalist and politician, b. Philadelphia. He became a journalist in Charleston, S.C., and gave ardent support to the War of 1812. As a special agent to Algiers, he helped secure (1813-15) the release of American prisoners held by Algerian pirates. He retu...
Read more
|
|
|
Milton Babbitt
Milton Babbitt 1916-, American composer, b. Philadelphia. Babbitt turned to music after studying mathematics. He was a composition pupil of Roger Sessions at Princeton. Babbitt has attempted to apply twelve-tone principles to all the elements of composition: dynamics, timbre, and rhythm, as well as...
Read more
|
|
|
Donald Randall Richberg
Donald Randall Richberg 1881-1960, American public official, b. Knoxville, Tenn. He practiced law in Chicago, served as attorney for the city and for Illinois, and became nationally known after specializing in railroad and labor legislation. He helped draft (1933) the act that established the Natio...
Read more
|
|
hospital
hospital institution for the care of the sick, maintained by private endowment or public funds or both. General hospitals minister to all types of illness, while special hospitals are concerned with only one disease or group of diseases. Many hospitals are maintained solely for the treatment of mil...
Read more
|
