pinnula

[pin-yuh-luh]

noun, plural pin·nu·lae [pin-yuh-lee] /ˈpɪn yəˌli/.

a pinnule.
a barb of a feather.

Origin of pinnula

1740–50; < Latin, diminutive of pinna pinna; see -ule
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019