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Aves

American  
[ey-veez] / ˈeɪ viz /

noun

(used with a plural verb)
  1. a class of vertebrates comprising the birds.


Aves British  
/ ˈeɪviːz /

plural noun

  1. the class of vertebrates comprising the birds See bird

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Aves

1895–1900; < New Latin; Latin, plural of avis bird