'Impennes' definitions:
Definition of 'Impennes'
From: GCIDE
- Impennes \Im*pen"nes\, n. pl. [NL., fr. L. pref. im- not + penna feather.] (Zool.) An order of birds, including only the penguins, in which the wings are without quills, and not suited for flight. [1913 Webster]