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dengue fever

(Encyclopedia)dengue fever dĕngˈgē, –gā [key], acute infectious disease caused by four closely related viruses and transmitted by the bite of the female Aedes mosquito; it is also known as breakbone fever and...

Cranach, Lucas

(Encyclopedia)Cranach or Kranach, Lucas both: lo͞oˈkäs kräˈnäkh [key], the Elder, 1472–1553, German painter and engraver. The son of a painter, he settled in Wittenberg c.1504 and was court painter successi...

cowrie

(Encyclopedia)cowrie or cowry both: kouˈrē [key], common name applied to marine gastropods belonging to the family Cypraeidae, a well-developed family of marine snails found in the tropics. Cowries are abundant i...

cupric sulfate

(Encyclopedia)cupric sulfate ko͞oˈprĭk sŭlˈfāt, kyo͞oˈ– [key] or copper (II) sulfate, chemical compound, CuSO4, taking the form of white rhombohedral crystals or amorphous powder. It decomposes at 650℃ ...

convection

(Encyclopedia)convection, mode of heat transfer in fluids (liquids and gases). Convection depends on the fact that, in general, fluids expand when heated and thus undergo a decrease in density (since a given volume...

eutrophication

(Encyclopedia)eutrophication yo͞otrōˌfĭkāˈshən [key], aging of a lake by biological enrichment of its water. In a young lake the water is cold and clear, supporting little life. With time, streams draining i...

amaranth

(Encyclopedia)CE5 Green amaranth, Amaranthus retroflexus amaranth ămˈərănthˌ [key] [Gr.,=unfading], common name for the Amaranthaceae (also commonly known as the pigweed family), a family of herbs, trees, ...

Goldsmith, Oliver

(Encyclopedia)Goldsmith, Oliver, 1730?–1774, Anglo-Irish author. The son of an Irish clergyman, he was graduated from Trinity College, Dublin, in 1749. He studied medicine at Edinburgh and Leiden, but his career ...

growing season

(Encyclopedia)growing season, period during which plant growth takes place. In temperate climates the growing season is limited by seasonal changes in temperature and is defined as the period between the last killi...

needlefish

(Encyclopedia)needlefish, common name for members of the family Belonidae, which comprises species of elongated, surface-swimming predaceous fish abundant in warm seas. They have beaklike jaws armed with sharp teet...