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to diminish the infectivity of (a virus) by repeated culturing in chick embryos.


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  • Aviary

    a large cage or a house or enclosure in which birds are kept. Historical Examples Mr. Morris mentions as a unique fact that a kestrel (Falco tinnunculus) bred in an aviary. The Variation of Animals and Plants Under Domestication, Volume II (of 2) Charles Darwin I have seen them alive at Singapore in an aviary, […]

  • Aviarist

    a large cage or a house or enclosure in which birds are kept. noun a person who keeps an aviary noun (pl) aviaries a large enclosure in which birds are kept n. 1570s, from Latin aviarium “place in which birds are kept,” neuter of aviarius “of birds,” from avis “bird,” from PIE *awi- “bird” (cf. […]

  • Aviate

    to fly or fly in an aircraft. Historical Examples But in the same sense there is an impulse to aviate, to run a typewriter or write stories for magazines. Human Nature and Conduct John Dewey “Now the next thing is for you to teach us all to aviate,” laughed the southerner. The Boy Scouts of […]

  • Aviatic

    the design, development, production, operation, and use of aircraft, especially heavier-than-air aircraft. military aircraft. noun the art or science of flying aircraft the design, production, and maintenance of aircraft (US) military aircraft collectively n. 1866, from French aviation, noun of action from stem of Latin avis “bird” (see aviary). Coined 1863 by French aviation pioneer […]

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