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giant clam

(Encyclopedia) giant clam, common name for the largest bivalve mollusk in the world, Tridacna gigas, also known as the bear's paw clam. The giant clam may weigh over 500 lb (225 kg) and attain a…

South Dakota

(Encyclopedia) CE5 South DakotaSouth Dakotadəkōˈtə [key], state in the N central United States. It is bordered by North Dakota (N), Minnesota and Iowa (E), Nebraska (S), and Wyoming and Montana (W…

pitchblende

(Encyclopedia) pitchblendepitchblendepĭchˈblĕndˌ [key], dark, lustrous, heavy mineral, a source of radium and uranium. Largely natural uranium oxides, triuranium octaoxide (U3O8) and uranium dioxide…

Battle of the Bulge

(Encyclopedia) Battle of the Bulge, popular name in World War II for the German counterattack in the Ardennes, Dec., 1944–Jan., 1945. More than a million men fought in what is also known as the…

Oliveros, Pauline

(Encyclopedia) Oliveros, Pauline, 1932–2016, American composer and musician, b. Houston, Tex., studied Univ. of Houston, San Francisco State College (B.A., 1957). She began playing the accordion as a…

bull-roarer

(Encyclopedia) bull-roarer, an instrument consisting of slit board or chamber attached to a cord. When swung around in the air, it emits a deep, vibrant, “whirrrrrr”-like sound. The mythology of some…