Columbia Encyclopedia

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bookplate

(Encyclopedia)bookplate, label pasted in a book to indicate ownership, also called ex libris [Lat.,=from the books of]. The bookplate is usually of paper on which heraldic or other designs are engraved or printed. ...

Ray, Man

(Encyclopedia)Ray, Man, 1890–1976, American photographer, painter, and sculptor, b. Philadelphia. Along with Marcel Duchamp, Ray was a founder of the Dada movement in New York and Paris. He is celebrated for his ...

San Marcos

(Encyclopedia)San Marcos săn märˈkəs [key]. 1 City (1990 pop. 38,974), San Diego co., S Calif., a northern suburb of San Diego; settled 1880s, inc. 1963. Citrus fruit, avocados, flowers, and ornamental plants a...

lock and key

(Encyclopedia)lock and key, fastening fitted to an entryway, such as a gate or door, or a container, such as a cabinet, drawer or safe, to keep it closed and/or prevent unauthorized access or use. Locks typically c...

di Stéfano, Alfredo

(Encyclopedia)di Stéfano, Alfredo, 1926–2014, Argentinian-born soccer star, one of the game's greats. Nominally a center-forward, he became famous for his versatility on the field as well as for his strength and...

shoring

(Encyclopedia)shoring, placing of props or braces, called shores, against or beneath a structure for support. Shoring is often used to stabilize a building when it is to undergo structural modification or repair. C...

petrology

(Encyclopedia)petrology, branch of geology specifically concerned with the origin, composition, structure, and properties of rocks, primarily igneous and metamorphic, and secondarily sedimentary. It includes petrog...

bearing

(Encyclopedia)bearing, machine part designed to reduce friction between moving parts or to support moving loads. There are two main kinds of bearings: the antifriction type, such as the roller bearing and the ball ...

sewing machine

(Encyclopedia)sewing machine, device that stitches cloth and other materials. An attempt at mechanical sewing was made in England (1790) with a machine having a forked, automatic needle that made a single-thread ch...

palate

(Encyclopedia)palate pălˈĭt [key], roof of the mouth. The front part, known as the hard palate, formed by the upper maxillary bones and the palatine bones, separates the mouth from the nasal cavity. It is compos...