pennis
pennis is a Latin form of penna, meaning “feather; wing”. It is the ablative plural feminine noun or dative plural feminine noun.
Found 92 times in the Latin texts on Socratos.
Where it is used
Vergil, Georgics 4.73: tum trepidae inter se coeunt pennisque coruscant
Ovid, Metamorphoses 4.665: Lucifer ortus erat. Pennis ligat ille resumptis
All forms of penna (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.