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Schick test

(Encyclopedia)Schick test, diagnostic test designed to evaluate susceptibility to diphtheria. A small amount of diphtheria toxin is injected into the skin; the injection will produce an area of redness and swelling...

Saint Charles

(Encyclopedia)Saint Charles. 1 City (1990 pop. 22,501), Kane co., NE Ill., on the Fox River, a suburb of Chicago; inc. 1850. Located in an agricultural area (corn and soybeans), the city has food-processing, alumin...

loudspeaker

(Encyclopedia)CE5 Electrodynamic loudspeaker loudspeaker or speaker, device used to convert electrical energy into sound. It consists essentially of a thin flexible sheet called a diaphragm that is made to vibr...

Sonora

(Encyclopedia)Sonora sōnōˈrä [key], state (1990 pop. 1,823,606), 70,484 sq mi (182,554 sq km), NW Mexico, on the Gulf of California, S of Arizona. Hermosillo is the capital. Sonora is mostly mountainous, with v...

interest

(Encyclopedia)interest, charge for the use of credit or money, usually figured as a percentage of the principal and computed annually. Simple interest is computed annually on the principal. Compound interest, paid ...

dwarf tree

(Encyclopedia)dwarf tree, in horticultural practice, a tree artificially kept to a smaller size than is normal for average members of the species. This is usually accomplished either by limiting its root space and ...

composite material

(Encyclopedia)composite material or composite, any material made from at least two discrete substances, such as concrete. Many materials are produced as composites, such as the fiberglass-reinforced plastics used f...

coronet

(Encyclopedia)coronet kôrˌənĕtˈ, kŏrˌə– [key], head attire of a noble of high rank, worn on state occasions. It is inferior to the crown. British peers wear their coronets at the coronation of their sover...

clumber spaniel

(Encyclopedia)clumber spaniel, breed of medium-sized sporting dog developed in France and perfected at Clumber Park, an English estate. It stands about 17 in. (43.2 cm) high at the shoulder and weighs between 50 an...

albedo

(Encyclopedia)albedo ălbēˈdō [key], reflectivity of the surface of a planet, moon, asteroid, or other celestial body that does not shine by its own light. Albedo is measured as the fraction of incident light th...