Columbia Encyclopedia

(Encyclopedia)  CE5 Triode electron tube electron tube, device consisting of a sealed enclosure in which electrons flow between electrodes separated either by a vacuum (in a vacuum tube) or by an ionized gas at l...

(Encyclopedia) Pandora păndôrˈə [key], in Greek mythology, first woman on earth. Zeus ordered Hephaestus to create her as vengeance upon man and his benefactor, Prometheus. The gods endowed her with every charm,...

(Encyclopedia) Powell, William, 1892–1984, American movie actor, b. Pittsburgh. Powell made his stage debut in 1912. He played the dapper villain in such early films as Sherlock Holmes (1921), Romola (1924), and B...

(Encyclopedia) Feuerbach, Ludwig Andreas foiˈərbäkh [key], 1804–72, German philosopher, educated at Heidelberg and Berlin; son of Paul Johann Anselm von Feuerbach. At first a Hegelian, he abandoned absolute id...

(Encyclopedia) Berdyaev, Nicholas bĕrdyīˈəf [key], 1874–1948, Russian theologian and religious philosopher, b. Kiev. After an early period as a Marxist, Berdyaev became prominent in a brilliant circle of Russi...

(Encyclopedia) Lazarus lăzˈərəs [key] [Gr.,=Heb., Eleazar], in the New Testament. 1 Brother of Mary and Martha of Bethany who, after four days in the tomb, was brought back to life by Jesus. 2 Beggar in the para...

(Encyclopedia) Wolpe, Stefan shtĕfˈän vôlˈpə [key], 1902–72, German–American composer. Of Jewish ancestry, he went to live in Palestine in 1933, but settled in the United States in 1938. Wolpe wrote severa...

(Encyclopedia) parody, mocking imitation in verse or prose of a literary work. The following poem by Robert Southey was parodied by Lewis Carroll: “You are old, Father William,” the young man cried; “The few l...

(Encyclopedia) Orbiting Geophysical Observatory (OGO), series of six orbiting observatories (see observatory, orbiting) launched between 1964 and 1969 by the National Aeronautics and Space Administration (NASA) to s...

(Encyclopedia) biophysics, application of various methods and principles of physical science to the study of biological problems. In physiological biophysics physical mechanisms have been used to explain such biolog...