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fumaric acid

(Encyclopedia)fumaric acid fyo͞omărˈĭk [key] or trans-butenedioic acid, HO2CCH=CHCO2H, unsaturated dicarboxylic acid that melts at 287℃. Maleic acid, or cis-butenedioic acid, is a geometric isomer of fumaric ...

Williams, Eleazer

(Encyclopedia)Williams, Eleazer ĕlēāˈzər [key], c.1787–1858, missionary among Native North Americans. He was the son of Thomas Williams, a St. Regis Native American chief, and a white woman; he was educated ...

Hsüan-tsang

(Encyclopedia)Hsüan-tsang shüän-dzäng [key], 605?–664, Chinese Buddhist scholar and translator. He early entered monastic life and later traveled in China, teaching and studying. Between 629 and 645 he made a...

Desai, Anita

(Encyclopedia)Desai, Anita dĕsīˈ [key], 1937–, Indian fiction writer, b. Mussoorie as Anita Mazumdar, grad. Delhi Univ. (B.A., 1957). A prolific novelist, she often paints a subtly intelligent and darkly evoca...

citric acid

(Encyclopedia)citric acid or 2-hydroxy-1,2,3-propanetricarboxylic acid, HO2CCH2C(OH)(CO2H)CH2CO2H, an organic carboxylic acid containing three carboxyl groups; it is a solid at room temperature, melts at 153℃, an...

Hotan

(Encyclopedia)Hotan kōˈtänˈ [key], city and oasis (1994 est. pop. 75,900), SW Xinjiang Uygur Autonomous Region, China, near the headstream of the Hotan River; the name sometimes appears as Ho-t'ien. It is the c...

holmium

(Encyclopedia)holmium hōlˈmēəm [key] [Lat.,=Stockholm], metallic chemical element; symbol Ho; at. no. 67; at. wt. 164.93032; m.p. about 1,474℃; b.p. about 2,425℃; sp. gr. 8.78 at 25℃; valence +3. Holmium ...

oxalic acid

(Encyclopedia)oxalic acid ĕthˌāndīōĭk [key], HO2CCO2H, a colorless, crystalline organic carboxylic acid that melts at 189℃ with sublimation. Oxalic acid and oxalate salts are poisonous. Oxalic acid is found...

Marston, John

(Encyclopedia)Marston, John, 1576–1634, English satirist and dramatist, b. Oxfordshire, grad. Oxford, 1594. In accordance with his father's wishes he studied law at Middle Temple, but his interests soon turned to...

Conway Cabal

(Encyclopedia)Conway Cabal, 1777, intrigue in the American Revolution to remove George Washington as commander in chief of the Continental Army. Washington had been defeated at Brandywine and Germantown, and Horati...