Columbia Encyclopedia

Search results

500 results found

Bruno, Giordano

(Encyclopedia)Bruno, Giordano jōrdäˈnō bro͞oˈnō [key], 1548–1600, Italian philosopher, b. Nola. The son of a professional soldier, he entered the Dominican order early in his youth and was ordained a pries...

Harrison, William Henry

(Encyclopedia)Harrison, William Henry, 1773–1841, 9th President of the United States (Mar. 4–Apr. 4, 1841), b. “Berkeley,” Charles City co., Va.; son of Benjamin Harrison (1726?–1791) and grandfather of B...

loran

(Encyclopedia)loran lôrˈănˌ [key], long-range, accurate radio navigational system used by a ship or aircraft to confirm or to determine its geographical position. The term loran is derived from the words long-r...

coherence

(Encyclopedia)coherence, constant phase difference in two or more Waves over time. Two waves are said to be in phase if their crests and troughs meet at the same place at the same time, and the waves are out of pha...

diminishing returns, law of

(Encyclopedia)diminishing returns, law of, in economics, law stating that if one factor of production is increased while the others remain constant, the overall returns will relatively decrease after a certain poin...

inertia

(Encyclopedia)inertia ĭnûrˈshə [key], in physics, the resistance of a body to any alteration in its state of motion, i.e., the resistance of a body at rest to being set in motion or of a body in motion to any c...

photosphere

(Encyclopedia)photosphere, luminous, apparently opaque layer of gases that forms the visible surface of the sun or any other star. The photosphere lies between the dense interior gases and the more attenuated gases...

Woffington, Peg

(Encyclopedia)Woffington, Peg (Margaret Woffington), 1714?–1760, English actress, b. Dublin. Her charm and beauty as a child attracted attention, and at the age of 10 she acted in the role of Polly Peachum in a L...

kite, in aviation and recreation

(Encyclopedia)kite, in aviation, aircraft restrained by a towline and deriving its lift from the aerodynamic action of the wind flowing across it. Commonly the kite consists of a light framework upon which paper, s...

Bancroft, Edward

(Encyclopedia)Bancroft, Edward, 1744–1821, spy in the American Revolution, b. Westfield, Mass. He studied medicine and natural history, producing a book (1769) on Guiana's flora and fauna, a defense of the coloni...