Apteryx \Ap"te*ryx\, n. [Gr. 'a priv. + pte`ryx wing. Cf. Aptera.]

(Zo["o]l.) A genus of New Zealand birds about the size of a hen, with only short rudiments of wings, armed with a claw and without a tail; the kiwi. It is allied to the gigantic extinct moas of the same country. Five species are known.

Source: Webster's Revised Unabridged Dictionary (1913)