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Nicaea, First Council of

(Encyclopedia)Nicaea, First Council of, 325, 1st ecumenical council, convened by Roman Emperor Constantine the Great to solve the problems raised by Arianism. It has been said that 318 persons attended, but a more ...

centrifuge

(Encyclopedia)centrifuge sĕnˈtrəfyo͞oj [key], device using centrifugal force to separate two or more substances of different density, e.g., two liquids or a liquid and a solid. The centrifuge consists of a fixe...

Crossfield, Scott

(Encyclopedia)Crossfield, Scott (Albert Scott Crossfield), 1921–2006, American aviator, b. Berkeley, Calif. A fighter pilot and flight instructor in the navy (1942–46) during World War II, he studied aeronautic...

Cephalus

(Encyclopedia)Cephalus sĕˈfäləs [key], in Greek mythology, husband of Procris. The two swore eternal fidelity, but Eos, who had fallen in love with Cephalus, persuaded him to test his wife. Cephalus disguised h...

Glenn, John Herschel, Jr.

(Encyclopedia)Glenn, John Herschel, Jr., 1921–2016, American astronaut and politician, b. Cambridge, Ohio. On Feb. 20, 1962, he became the first American and the third person to orbit the earth, circling the glob...

Grumman, Leroy Randle

(Encyclopedia)Grumman, Leroy Randle, 1895–1982, American aviation pioneer and aerospace executive, b. Huntington, N.Y. After graduating from Cornell (1916), he joined the U.S. navy, where he served as a flight in...

urinalysis

(Encyclopedia)urinalysis yo͝orˌənălˈĭsĭs [key], clinical examination of urine for the purpose of medical diagnosis. Urine is initially examined for such characteristics as color, odor, and specific gravity. ...

Leonov, Aleksei Arkhipovich

(Encyclopedia)Leonov, Aleksei Arkhipovich ŭlˌyĭksyāˈ ärkhˌyĭpôˈvyĭch [key], 1934–2019, Soviet-Russian cosmonaut and military officer. While serving as copilot of Voskhod 2 (Mar. 18–19, 1964), he beca...

Schick, Béla

(Encyclopedia)Schick, Béla bāˈlə shĭk [key], 1877–1967, American pediatrician, b. Hungary, M.D. Karl Franz Univ., Graz, 1900. After having taught at the Univ. of Vienna (1902–23), he came to the United Sta...

personality

(Encyclopedia)personality, in psychology, the patterns of behavior, thought, and emotion unique to an individual, and the ways they interact to help or hinder the adjustment of a person to other people and situatio...