impennous

== English == === Etymology === Latin prefix im- (“not”) and penna (“wing, feather”). === Pronunciation === IPA(key): /ɪmˈpɛnəs/ === Adjective === impennous (not comparable) Lacking wings. an impennous insect ==== Synonyms ==== apterous === References === “impennous”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.