ˈpinyələ noun
( plural pinnu·lae -ˌlē, -ˌlī)
Etymology: New Latin, from Latin, small feather, small fin, from pinna feather, wing, fin, alteration of penna feather, wing — more at pen
1. : pinnule 2, 3
2. : a barb of a feather
• pin·nu·lar -_lə(r) adjective