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mannerism

(Encyclopedia)mannerism, a style in art and architecture (c.1520–1600), originating in Italy as a reaction against the equilibrium of form and proportions characteristic of the High Renaissance. In Florence, Pont...

compound

(Encyclopedia)compound, in chemistry, a substance composed of atoms of two or more elements in chemical combination, occurring in a fixed, definite proportion and arranged in a fixed, definite structure. A compound...

binary star

(Encyclopedia)CE5 A. Eclipsing binary: Primary component passing behind secondary (dimmer) component B. Light curve for eclipsing binary binary star or binary system, pair of stars that are held together by the...

abacus, in architecture

(Encyclopedia)abacus ăbˈəkəs [key], in architecture, flat slab forming the top member of a capital. In classical orders it varies from a square form having unmolded sides in the Greek Doric, to thinner proporti...

Betzig, Robert Eric

(Encyclopedia)Betzig, Robert Eric, 1960–, American physicist, b. Ann Arbor, Mich., Ph.D. Cornell, 1988. Betzig worked at AT&T Bell Laboratories from 1988 to 1996, when he become vice president of research and...

Pont du Gard

(Encyclopedia)Pont du Gard pôN dü gär [key], Roman aqueduct across the Gard River, Gard dept., S France. Built in 19 b.c. to supply Nîmes with water, it consists of three tiers of arches and is c.900 ft (270 m)...

Gabrieli, Andrea

(Encyclopedia)Gabrieli, Andrea jōvänˈnē [key], c.1555–1612. Giovanni was for a time a singer in the court choir under Lasso in Munich and became (1585) second organist at St. Mark's, succeeding to first organ...

Cruveilhier, Jean

(Encyclopedia)Cruveilhier, Jean zhäN krüvĕyāˈ [key], 1791–1874, French physician. The first professor of pathology at the Univ. of Paris (from 1836), he introduced the descriptive method into the study of th...

Grégoire, Henri

(Encyclopedia)Grégoire, Henri äNrēˈ grāgwärˈ [key], 1750–1831, French priest, writer, and revolutionist. A Jansenist (see under Jansen, Cornelis), he was prominent in the States-General of 1789 and support...

X-ray crystallography

(Encyclopedia)X-ray crystallography, the study of crystal structures through X-ray diffraction techniques. When an X-ray beam bombards a crystalline lattice in a given orientation, the beam is scattered in a defini...