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Aves - Dictionary Definition and Overview |
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Aves : \A"ves\, n. pl. [L., pl. of avis bird.] (Zo["o]l.)
The class of Vertebrata that includes the birds.
Note: Aves, or birds, have a complete double circulation,
oviparous, reproduction, front limbs peculiarly
modified as wings; and they bear feathers. All existing
birds have a horny beak, without teeth; but some
Mesozoic fossil birds (Odontornithes) had conical teeth
inserted in both jaws. The principal groups are:
Carinat[ae], including all existing flying birds;
Ratit[ae], including the ostrich and allies, the
apteryx, and the extinct moas; Odontornithes, or
fossil birds with teeth.
Note: The ordinary birds are classified largely by the
structure of the beak and feet, which are in direct
relation to their habits. See Beak, Bird,
Odontonithes.
Based on WordNet (r) 2.0 (August 2003)
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