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whiting, powdery substance

(Encyclopedia)whiting, white, powdery substance, prepared by grinding chalk or some other source of calcium carbonate. When mixed with linseed oil it forms putty, and with water and several other substances it cons...

scheelite

(Encyclopedia)scheelite shāˈlīt, shēˈ– [key], heavy white or yellow mineral, calcium tungstate, CaWO4, crystallizing in the tetragonal system. It is found in granite pegmatites, in contact-metamorphic deposi...

daisy

(Encyclopedia)daisy [O.E.,=day's eye], name for several common wildflowers of the family Asteraceae (aster family). The daisy of literature, the true daisy, is Bellis perennis, called in the United States English d...

English sparrow

(Encyclopedia)English sparrow or house sparrow, small bird, Passer domesticus, common throughout most of the world. English sparrows are 4 to 7 in. (10–18 cm) long, with short, stout bills. The male is brown with...

Nakamura, Shuji

(Encyclopedia)Nakamura, Shuji, 1954–, Japanese physicist and electronics engineer, grad. Univ. of Tokushima (D.Eng., 1994). Nakamura joined the Nichia Corporation in 1977, and it was there that he began his life-...

McKim, Charles Follen

(Encyclopedia)McKim, Charles Follen, 1847–1909, American architect, b. Chester co., Pa., studied (1867–70) at the École des Beaux-Arts. He was one of the founders of the firm of McKim, Mead, and Bigelow, which...

Tulsa Race Massacre of 1921

(Encyclopedia)TulsThunberga race massacre, Greenwood, Okla., May 31 to June 1, 1921. On the evening of May 31, 1921, a white lynch mob gathered outside the ...

spiritual

(Encyclopedia)spiritual, a religious folk song of American origin, particularly associated with African-American Protestants of the southern United States. The African-American spiritual, characterized by syncopati...

lead acetate

(Encyclopedia)lead acetate, chemical compound, a white crystalline substance with a sweetish taste. Like other lead compounds, it is very poisonous. Lead acetate is soluble in water and glycerin. With water it form...

bleaching powder

(Encyclopedia)bleaching powder, white or nearly white powder that is usually a mixture of calcium chloride hypochlorite, CaCl(OCl); calcium hypochlorite, Ca(OCl)2; and calcium chloride, CaCl2. Sometimes called chlo...