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Yellowstone National Park

(Encyclopedia)Yellowstone National Park, 2,219,791 acres (899,015 hectares), the world's first national park (est. 1872), NW Wyo., extending into Montana and Idaho. It lies mainly on a broad plateau in the Rocky Mt...

carnivore

(Encyclopedia)carnivore kärˈnəvôrˌ [key], term commonly applied to any animal whose diet consists wholly or largely of animal matter. In animal systematics it refers to members of the mammalian order Carnivora...

disinfectant

(Encyclopedia)disinfectant, agent that destroys disease-causing microorganisms and their spores. Disinfectants, or germicides, are sometimes considered to be substances applied to inanimate bodies, whereas antisept...

alizarin

(Encyclopedia)alizarin əlĭzˈərĭn [key], or 1,2-dihydroxyanthraquinone, mordant vegetable dye obtained originally from the root of the madder plant (Rubia tinctorum), in which it occurs as a glucoside. The term...

alkali

(Encyclopedia)alkali ălˈkəlī [key] [Arab., al-gili=ashes of saltwort], hydroxide of an alkali metal. Alkalies are readily soluble in water and form strongly basic solutions with a characteristic acrid taste. Th...

cover crop

(Encyclopedia)cover crop, green temporary crop grown to prevent or reduce erosion and to improve the soil by building up its organic content. Green-manure crops, which are specifically grown for their organic conte...

custard-apple

(Encyclopedia)custard-apple, common name for members of the Annonaceae, a family of shrubs, woody vines, and small trees of the tropics. The custard-apples (Annona squamosa and A. reticulata) and other members of t...

chloroplast

(Encyclopedia)chloroplast klōrˈəplăstˌ, klôrˈ– [key], a complex, discrete green structure, or organelle, contained in the cytoplasm of plant cells. Chloroplasts are reponsible for the green color of almost...

Chelsea ware

(Encyclopedia)Chelsea ware, chinaware made in the mid-18th cent. at a factory in Chelsea, London. The earliest specimens extant are dated 1745 and have the potter's mark of a triangle and the word Chelsea. Nicholas...

Changchun

(Encyclopedia)Changchun chängˈcho͝onˈ [key], city, capital of Jilin prov., China, on the railroad between Harbin ...