Definitions

1. adjective

having no wings or wingless, especially referring to insects

“The apterous beetle was unable to fly due to its wing loss.”

2. noun

an insect or other animal that is wingless

“The researcher studied various apterous species to understand their behavior.”

3. noun

a part or organ that is wingless or has lost its wing-like structure

“The apterous condition of the wings was evident in the fossilized remains.”