1) Apteral 2) Wingless 3) Without wings 1) Wingless 
Without wings.
• (a.) Destitute of winglike membranous expansions, as a stem or petiole; -- opposed to alate. • (a.) Destitute of wings; apteral; as, apterous insects.
Without wings.
Wingless stage in the life-cycle of certain insects.
Ap'ter·ous adjective 1. (Zoology) Destitute of wings; apteral; as, apterous insects. 2. (Botany) Destitute of winglike membranous expansions, as a stem or petiole; -- opposed to alate . 
Without wings.
[adj] - (of insects) without wings
apterous 1. Zoology, having no wings. 2. Botany, having no winglike parts or extensions.
meaning without wings.
apteral adjective (of insects) without wings
without wings
wingless, as some insects. · without membranous expansions, as a stem.