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cacao

(Encyclopedia)cacao kəkäˈō, –kāˈ– [key], tropical tree (Theobroma cacao) of the family Sterculiaceae (sterculia family), native to South America, where it was first domesticated and was highly prized by t...

air mass

(Encyclopedia)air mass, large body of air within the earth's atmosphere in which temperature and humidity, although varying at different heights, remain similar throughout the body at any one height. Air masses for...

adaptation

(Encyclopedia)adaptation, in biology, has several meanings. It can mean the adjustment of living matter to environmental conditions and to other living things either in an organism's lifetime (physiological adaptat...

hydrogen

(Encyclopedia)hydrogen hīˈdrəjən [key] [Gr.,=water forming], gaseous chemical element; symbol H; at. no. 1; interval in which at. wt. ranges 1.00784–1.00811; m.p. −259.14℃; b.p. −252.87℃; density 0.08...

Little Entente

(Encyclopedia)Little Entente äntäntˈ [key], loose alliance formed in 1920–21 by Czechoslovakia, Romania, and Yugoslavia. Its specific purposes were the containment of Hungarian revisionism (of the terms of the...

hardness

(Encyclopedia)hardness, property of matter commonly described as the resistance of a substance to being scratched by another substance. The degree of hardness is relative, different substances being compared with o...

Gil Robles, José María

(Encyclopedia)Gil Robles, José María hōsāˈ märēˈä hēl rōˈblās [key], 1898–1980, Spanish politician. In 1931, after the proclamation of the Second Republic, he became leader of the newly organized rig...

septicemia

(Encyclopedia)septicemia sĕptĭsēˈmēə [key], invasion of the bloodstream by virulent bacteria that multiply and discharge their toxic products. The disorder, which is serious and sometimes fatal, is commonly k...

physical chemistry

(Encyclopedia)physical chemistry, branch of science that combines the principles and methods of physics and chemistry. It provides a fundamental theoretical and experimental basis for all of chemistry, including or...

salicylic acid

(Encyclopedia)salicylic acid or 2-hydroxybenzoic acid, C6H4(OH)CO2H, a colorless, crystalline organic carboxylic acid that melts at 159℃; it is soluble in ethanol and ether but is only slightly soluble in water. ...