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manure

(Encyclopedia)manure, term used in the United States to refer to excreta of animals, with or without added bedding; also called barnyard manure. In other countries the term often refers to any material used to fert...

Asimov, Isaac

(Encyclopedia)Asimov, Isaac ăzˈəmŏf [key], 1920–92, American author and scientist, b. Petrovichi, USSR, grad. Columbia (B.S., 1939; M.A., 1941; Ph.D., 1948). An astonishingly prolific author, he wrote over 40...

Pearl, The

(Encyclopedia)Pearl, The, one of four Middle English alliterative poems, all contained in a manuscript of c.1400, composed in the West Midland dialect, almost certainly by the same anonymous author, who flourished ...

Ticonderoga

(Encyclopedia)Ticonderoga tīˌkŏndərōˈgə [key], resort village (1990 pop. 2,770), Essex co., NE N.Y., on a neck of land between lakes George and Champlain; settled in the 17th cent., inc. 1889. At Ticonderoga...

cyanobacteria

(Encyclopedia)cyanobacteria sīˌənōbăktĭrˈēə, sī-ănˌō– [key] or blue-green algae, photosynthetic bacteria that contain chlorophyll. For many years they were classified in the plant kingdom along with ...

Greensburg

(Encyclopedia)Greensburg. 1 City (2020 pop. 14,976), seat of Westmoreland co., SW Pa.; settled c.1770, inc. as a city 1928. Located in a coal area, the city ...

treehopper

(Encyclopedia)treehopper, any member of three families of winged insects, remarkable for the curious shapes of most species. The shapes are due to the enlargement of the dorsal (upper) covering of the first thoraci...

turnip

(Encyclopedia)turnip, garden vegetable of the same genus of the family Cruciferae (or Brassicaceae; mustard family) as the cabbage; native to Europe, where it has been long cultivated. The two principal kinds are t...

Purdy, James Otis

(Encyclopedia)Purdy, James Otis, 1914–2009, American writer, b. near Hicksville, Ohio; studied Bowling Green State College (B.A., 1935), Univ. of Chicago (M.A., 1937), Univ. of Pueblo, Mexico. Idiosyncratic and a...

opal

(Encyclopedia)opal ōˈpəl [key], a mineral consisting of poorly crystalline to amorphous silica, SiO2·nH2O; the water content is quite variable but usually ranges from 3% to 10%. Common opal is usually colorless...