Defn: Destitute of winglike membranous expansions, as a stem or petiole; — opposed to atate.
APTERYGES
Ap*ter"y*ges, n. pl. Etym: [NL. See Apteryx.] (Zoöl.)
Defn: An order of birds, including the genus Apteryx.
APTERYX
Ap"te*ryx, n. Etym: [Gr. Aptera.] (Zoöl.)
Defn: 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.
APTITUDE
Apt"i*tude, n. Etym: [F. aptitude, LL. aptitudo, fr. L. aptus. See
Apt, and cf. Attitude.]
1. A natural or acquired disposition or capacity for a particular purpose, or tendency to a particular action or effect; as, oil has an aptitude to burn. He seems to have had a peculiar aptitude for the management of irregular troops. Macaulay.
2. A general fitness or suitableness; adaptation. That sociable and helpful aptitude which God implanted between man and woman. Milton.
3. Readiness in learning; docility; aptness. He was a boy of remarkable aptitude. Macaulay.
APTITUDINAL
Apt`i*tu"di*nal, a.