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specific gravity
(Encyclopedia)specific gravity, ratio of the weight of a given volume of a substance to the weight of an equal volume of some reference substance, or, equivalently, the ratio of the masses of equal volumes of the t...pitch, in music
(Encyclopedia)pitch, in music, the position of a tone in the musical scale, today designated by a letter name and determined by the frequency of vibration of the source of the tone. Pitch is an attribute of every m...Debussy, Claude Achille
(Encyclopedia)Debussy, Claude Achille klôd äshēlˈ dəbüsēˈ [key], 1862–1918, French composer, exponent of musical impressionism. He studied for 11 years at the Paris Conservatory, receiving its Grand Prix ...Sanctorius
(Encyclopedia)Sanctorius săngktôrˈēəs [key], Ital. Santorio, 1561–1636, Italian physiologist. He was a professor at Padua (1611–24). By his quantitative experiments in temperature, respiration, and weight,...ferric sulfate
(Encyclopedia)ferric sulfate or iron (III) sulfate, chemical compound, Fe2(SO4)3, a yellow rhombic crystalline hygroscopic water-soluble salt that decomposes when heated to a temperature of 480℃. The enneahydrate...freezing
(Encyclopedia)freezing, change of a substance from the liquid to the solid state. The temperature at which freezing occurs for a pure crystalline solid is called the freezing point and is a characteristic of the pa...Verkhoyansk
(Encyclopedia)Verkhoyansk vyĕrkhəyänskˈ [key], town, Sakha Republic, NE Siberian Russia, on the Yana River, near the Arctic Circle. A river port, a fur-collecting depot, and the center of a reindeer-raising are...Eris, in astronomy
(Encyclopedia)Eris, in astronomy, the largest known dwarf planet. Eris, whose highly eccentric elliptical orbit ranges from 38 AU to 97 AU and is inclined more than 44°, is the largest known object of the Kuiper b...stratosphere
(Encyclopedia)stratosphere strătˈəsfēr [key], second lowest layer of the earth's atmosphere. The level from which it extends outward varies with latitude; it begins c.51⁄2 mi (9 km) above the poles, c.6 or 7 ...Ritchie, Alexander Hay
(Encyclopedia)Ritchie, Alexander Hay, 1822–95, American engraver and painter, b. Scotland. He came to the United States in 1841 and a few years later established a successful workshop in New York City. His engrav...Browse by Subject
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