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The Collaborative International Dictionary
Apterous

Apterous \Ap"ter*ous\, a.

  1. (Zo["o]l.) Destitute of wings; apteral; as, apterous insects.

  2. (Bot.) Destitute of winglike membranous expansions, as a stem or petiole; -- opposed to alate. [1913 Webster] ||

Wiktionary
apterous

a. 1 (context zoology English) Destitute of wings; wingless. 2 (context biology English) Destitute of winglike membranous expansions, as a stem or petiole.

WordNet
apterous

adj. (of insects) without wings [syn: apteral]