(definition) by Webster 1913 Tue Dec 21 1999 at 21:52:20

Ap"ter*ous (#), a.

1. Zool.

Destitute of wings; apteral; as, apterous insects.

2. Bot.

Destitute of winglike membranous expansions, as a stem or petiole; -- opposed to atate.

 

© Webster 1913.

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