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citrus fruits

(Encyclopedia)citrus fruits, widely used edible fruits of plants belonging to Citrus and related genera of the family Rutaceae (orange family). Included are the tangerine, citrange, tangelo, orange, pomelo, grapefr...

Alba, Fernando Álvarez de Toledo, duque de

(Encyclopedia)Alba or Alva, Fernando Álvarez de Toledo, duque de ălˈbə, ălˈvə, Span. both: fārnänˈdō älˈvärāth dā tōlāˈᵺō do͞oˈkā dā älˈvä [key], b. 1507 or 1508, d. 1582, Spanish gener...

gecko

(Encyclopedia)gecko gĕkˈō [key], small or medium-sized lizard of the family Gekkonidae. Some 1,500 species are distributed throughout the warm regions of the world, mostly in the Old World. Despite folklore to t...

Giacometti, Alberto

(Encyclopedia)Giacometti, Alberto älbĕrˈtō jäkōmĕtˈtē [key], 1901–66, Swiss sculptor and painter; son of the impressionist painter Giovannia Giacometti; b. Stampa. He settled in Paris in 1922, studying w...

Disarmament Conference

(Encyclopedia)Disarmament Conference, 1932–37, meeting for the discussion of general disarmament. The first systematic efforts to limit armaments on an international scale, in either a quantitative or a qualitati...

division of labor

(Encyclopedia)division of labor, in economics, the specialization of the functions and roles involved in production. Division of labor is closely tied with the standardization of production, the introduction and pe...

Trumbull, John , American painter

(Encyclopedia)Trumbull, John, 1756–1843, American painter, b. Lebanon, Conn.; son of Gov. Jonathan Trumbull. He served in the Continental Army early in the Revolution as an aide to Washington. He resigned his com...

ultrasonics

(Encyclopedia)ultrasonics, study and application of the energy of sound waves vibrating at frequencies greater than 20,000 cycles per second, i.e., beyond the range of human hearing. The application of sound energy...

econometrics

(Encyclopedia)econometrics, technique of economic analysis that expresses economic theory in terms of mathematical relationships and then tests it empirically through statistical research. Econometrics attempts to ...

harmonica

(Encyclopedia)harmonica. 1 The simplest of the musical instruments employing free reeds, known also as the mouth organ or French harp. It was probably invented in 1829 by Friedrich Buschmann of Berlin, who called h...