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air lock
(Encyclopedia) air lock, compartment connecting two different environments, usually at different pressures, that enables personnel to transfer from one environment to the other. Space capsules have…ultrasound
(Encyclopedia) ultrasound or sonography, in medicine, technique that uses sound waves to study and treat hard-to-reach body areas. In scanning with ultrasound, high-frequency sound waves are…airfoil
(Encyclopedia) airfoil, surface designed to develop a desired force by reaction with a fluid, especially air, that is flowing across the surface. For example, the fixed wing surfaces of an airplane…Sault Sainte Marie, city, United States
(Encyclopedia) Sault Sainte Marie, city (1990 pop. 14,689), seat of Chippewa co., N Mich., Upper Peninsula, a port of entry on the St. Marys River opposite Sault Ste Marie, Ont.; inc. as a city 1887…Banksy
(Encyclopedia) Banksy, pseud. of an English graffiti artist, c.1974–, probably b. Bristol. He painted on walls, bridges, and the like in Bristol and London in the 1990s before he began to use (c.2000…Rub al Khali
(Encyclopedia) Rub al KhaliRub al Khalir&oomacr;b äl khäˈlē [key] [Arab.,=empty quarter], great desert of the Arabian peninsula, c.225,000 sq mi (582,750 sq km); one of the largest sand deserts…Rosbash, Michael Morris
(Encyclopedia) Rosbash, Michael Morris, 1944–, American geneticist, b. Kansas City, Mo., Ph.D. Massachusetts Institute of Technology 1970. Rosbash has been a professor at Brandeis Univ. since 1974,…collective bargaining
(Encyclopedia) collective bargaining, in labor relations, procedure whereby an employer or employers agree to discuss the conditions of work by bargaining with representatives of the employees,…Alcuin
(Encyclopedia) AlcuinAlcuinălˈkwĭn [key] or AlbinusAlbinusălbīˈnəs [key], 735?–804, English churchman and educator. He was educated at the cathedral school of York by a disciple of Bede; he became…harrow, in agriculture
(Encyclopedia) harrow, farm implement, consisting of a wooden or metal framework bearing metal disks, teeth, or sharp projecting points, called tines, which is dragged over plowed land to pulverize…Trending
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