from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Which does not have wings, such as certain insects.
from the GNU version of the Collaborative International Dictionary of English
- adj. Having no wings, as some insects.
from The Century Dictionary and Cyclopedia
- Wingless; having no wings; apterous.
Latin prefix im- not, and Latin penna, wing or feather. (Wiktionary)