Columbia Encyclopedia

(Encyclopedia) pterosaur tĕrˈəsôrˌ [key] [Gr., = winged lizard], extinct flying reptile (commonly called pterodactyl [Gr., = wing finger]) of the order Pterosauria, common in the late Triassic and Creta...

(Encyclopedia) Berrigan brothers bĕrˈĭgən [key], American Catholic priests, writers, and social activists. Daniel Berrigan, 1921–2016, b. Syracuse, N.Y., was ordained in the Society of Jesus (Jesuits) in 1952....

(Encyclopedia) fugue fyo͞og [key] [Ital.,=flight], in music, a form of composition in which the basic principle is imitative counterpoint of several voices. Its main elements are: (1) a theme, or subject, stated fi...

(Encyclopedia) airship, an aircraft that consists of a cigar-shaped gas bag, or envelope, filled with a lighter-than-air gas to provide lift, a propulsion system, a steering mechanism, and a gondola accommodating pa...

(Encyclopedia) Musharraf, Pervez pĕrvāsˈ mo͞oshärˈrŭf [key], 1943–2023, Pakistani army offi...

(Encyclopedia) Parthia pärˈthēə [key], ancient country of Asia, SE of the Caspian Sea. In its narrowest limits it consisted of a mountainous region intersected with fertile valleys, lying S of Hyrcania and corre...

(Encyclopedia) Murdoch, Dame Iris (Dame Jean Iris Murdoch) mûrˈdŏk [key], 1919–99, British novelist and philosopher, b. Dublin, Ireland, grad. Oxford (1942). In 1948 she was named lecturer in philosophy at Oxfo...

(Encyclopedia) computer graphics, the transfer of pictorial data into and out of a computer. Using analog-to-digital conversion techniques, a variety of devices—such as curve tracers, digitizers, and light pens—...

(Encyclopedia) Confederate cruisers, in U.S. history, warships constituting the South's seagoing navy. At the outbreak of the Civil War the United States ranked next to Great Britain in merchant marine. Since almost...

(Encyclopedia) virtual reality (VR) or virtual environment (VE), computer-generated environment with and within which people can interact. The advantage of VR is that it can immerse people in an environment that wou...