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Coanda effect

(Encyclopedia)Coanda effect or wall-attachment effect, the tendency of a moving fluid, either liquid or gas, to attach itself to a surface and flow along it. As a fluid moves across a surface a certain amount of fr...

Dennett, Tyler

(Encyclopedia)Dennett, Tyler dĕnˈĭt [key], 1883–1949, American historian and educator, b. Spencer, Wis. Dennett was lecturer in American history at Johns Hopkins (1923–24) and at Columbia (1927–28), chief ...

Van Rompuy, Herman Achille

(Encyclopedia)Van Rompuy, Herman Achille, 1947–, Belgian statesman, b. Etterbeek. A Flemish Christian Democrat, he was president of the party from 1988 to 1993 and was a member of Belgium's parliament, serving in...

Fogazzaro, Antonio

(Encyclopedia)Fogazzaro, Antonio äntôˈnyō fōgät-tsäˈrō [key], 1842–1911, Italian novelist and poet. His first work was a verse romance, Miranda (1874). Primarily concerned with moral issues, he was parti...

formic acid

(Encyclopedia)formic acid or methanoic acid mĕthˌənōˈĭk [key], HCO2H, a colorless, corrosive liquid with a sharp odor; it boils at 100.7℃ and solidifies at 8.4℃. It has the lowest molecular weight and is ...

interval

(Encyclopedia)interval, in music, the difference in pitch between two tones. Intervals may be measured acoustically in terms of their vibration numbers. They are more generally named according to the number of step...

Joinville, Jean, sire de

(Encyclopedia)Joinville, Jean, sire de zhäN sēr də zhwăNvēlˈ [key], 1224?–1317?, French chronicler, biographer of Louis IX of France (St. Louis). As seneschal (governor) of Champagne, Joinville was a close ...

swordfish

(Encyclopedia)swordfish, large food and game fish, Xiphias gladius, of the warmer Atlantic and Pacific waters. It is named for its sharp, broad, elongated upper jaw, which it uses to flail and injure its prey of sm...

snapper

(Encyclopedia)snapper, name for members of the Lutjanidae, a family of spiny-finned food and game fishes found chiefly in tropical coastal waters. Snappers are carnivorous, active, and voracious, with large mouths ...

wind shear

(Encyclopedia)wind shear, a sudden, drastic change in wind direction or speed over a comparatively short distance. Most winds travel horizontally, as does most wind shear, but under certain conditions, including th...