Ap'ter-yx, n.

noun

n. [Gr. ἀ priv. and πτέρυξ, wing. Cf. APTERA.] (Ornith.) A bird of New Zealand of the ostrich or brevipennate family, with only short rudiments of wings, armed with a claw, and without a tail. Baird.

An engraving of an apteryx, or kiwi, standing in profile.
Apteryx (A. Mantelli).