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Echinodermata

(Encyclopedia) CE5 Internal anatomy of a sea star, representative of the phylum Echinodermata EchinodermataEchinodermataəkīˌnōdûrˈmətə [key] [Gr.,=spiny skin], phylum of exclusively marine bottom…

Lancaster, cities, United States

(Encyclopedia) Lancaster. 1 Uninc. city (1990 pop. 97,291), Los Angeles co., S Calif., in Antelope Valley and in the Mojave Desert; laid out 1894. It developed as a trade center for an irrigated…

estrogen

(Encyclopedia) CE5 estrogenestrogenĕsˈtrəjən [key], any one of a group of hormones synthesized by the reproductive organs and adrenal glands in females and, in lesser quantities, in males. The…

noise pollution

(Encyclopedia) noise pollution, human-created noise harmful to health or welfare. Transportation vehicles are the worst offenders, with aircraft, railroad stock, trucks, buses, automobiles, and…

nonlinear dynamics

(Encyclopedia) nonlinear dynamics, study of systems governed by equations in which a small change in one variable can induce a large systematic change; the discipline is more popularly known as chaos…

mammal

(Encyclopedia) mammal, an animal of the highest class of vertebrates, the Mammalia. The female has mammary glands, which secrete milk for the nourishment of the young after birth. In the majority of…

Pietism

(Encyclopedia) PietismPietismpīˈətĭzəm [key], a movement in the Lutheran Church (see Lutheranism), most influential between the latter part of the 17th cent. and the middle of the 18th. It was an…

disease

(Encyclopedia) disease, impairment of the normal state or functioning of the body as a whole or of any of its parts. Some diseases are acute, producing severe symptoms that terminate after a short…

Cappadocia

(Encyclopedia) CappadociaCappadociakăpədōˈshə [key], ancient region of Asia Minor, watered by the Halys River (the modern Kizil Irmak), in present E central Turkey. The name was applied at different…