Columbia Encyclopedia

(Encyclopedia) zinc sulfate, chemical compound ZnSO4, a very water soluble, transparent, colorless, crystalline compound. It is commonly used as the heptahydrate, ZnSO4·7H2O, and is commonly called white vitriol; i...

(Encyclopedia) Waubeshiek wôˈbəshēk [key], c.1794–c.1841, Native North American prophet, also known as White Cloud. He was a friend and adviser of Black Hawk and by prophesying victory was chiefly responsible ...

(Encyclopedia) Pukaskwa National Park pŭkˈăskwə [key], c.725 sq mi (1,890 sq km), central Ont., Canada, near Marathon; est. 1971. Stretching for c.50 mi (80 km) along the north shore of Lake Superior between the...

(Encyclopedia) ribbon grass, ornamental perennial grass (Phalaris arundinacea var. picta), a variety of the reed canary grass. It has green leaves striped with white and is often cultivated in gardens; it is also kn...

(Encyclopedia) Seaver, Tom (George Thomas Seaver), 1944–2020, American baseball pitcher and sportscaster, b. Fresno, Calif. During his career (1967–86), he won a total of 311 games for the New York Mets, Cincinn...

(Encyclopedia) Burke, Kenneth Duva, 1897–1993, American critic, b. Pittsburgh, Pa. He was music critic for The Dial (1927–29) and The Nation (1934–36). A profound thinker whose writings have influenced other c...

(Encyclopedia) anglesite ăngˈgləsīt [key], pale green, blue, yellow-to-white, or colorless mineral, a sulfate of lead, PbSO4, that is formed by oxidation of galena, crystallizing in the orthorhombic system and o...

(Encyclopedia) Ku Klux Klan ko͞oˌ klŭks klăn [key], designation mainly given to two distinct secret societies that played a part in American history, although other less important groups have also used the name....

(Encyclopedia) lettuce, annual garden plant (Lactuca sativa and varieties) of the family Asteraceae (aster family), probably native to the East Indies or Asia Minor, possibly as a derivative of the widespread weed c...

(Encyclopedia)  CE5 leucine lo͞oˈsēn [key], organic compund, one of the 20 amino acids commonly found in animal proteins. Only the l-stereooisomer appears in mammalian protein. It is one of several essential am...