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carapace

(Encyclopedia)carapace kârˈəpās [key], shield, or shell covering, found over all or part of the anterior dorsal portion of an animal. In lobsters, shrimps, crayfish, and crabs, the carapace is the part of the e...

tortoiseshell

(Encyclopedia)tortoiseshell, horny, translucent, mottled plates covering the carapace of the tropical hawksbill turtle. The plates, too thin for most purposes in their original form, are usually built up in layers ...

bog

(Encyclopedia)bog, very old lake without inlet or outlet that becomes acid and is gradually overgrown with a characteristic vegetation (see swamp). Peat moss, or sphagnum, grows around the edge of the open water of...

concretion

(Encyclopedia)concretion, mass or nodule of mineral matter, usually oval or nearly spherical in shape, and occurring in sedimentary rock. It is formed by the accumulation of mineral matter in the pore spaces of the...

Ojibwa

(Encyclopedia)Ojibwa chĭpˈəwäˌ, –wə [key], group of Native North Americans whose language belongs to the Algonquian branch of the Algonquian-Wakashan linguistic stock (see Native American languages). Their ...

Congaree National Park

(Encyclopedia)Congaree National Park, 21,888 acres (8,862 hectares), central S.C., est. as Congaree Swamp National Monument 1976, designated a national park and renamed 2003. Located along the north bank of the mea...

Lamb, John

(Encyclopedia)Lamb, John, 1735–1800, American Revolutionary leader, b. New York City. Prior to the Revolution he was a leader of the Sons of Liberty in New York and helped form the New York committee of correspon...

tortoise

(Encyclopedia)tortoise tôrˈtəs [key], common name for a terrestrial turtle, especially one of the family Testudinidae. Tortoises inhabit warm regions of all continents except Australia. They have club-shaped fee...

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