pinna
pin.na \'pin-*\ \'pin-.e-, -.i-\ \'pin-*l\ n or pin.nae or pinnas [NL, fr. L, feather, wing - more at PEN] pl 1: a leaflet or primary division of a pinnate leaf or frond 2a: a feather, wing, or fin or some similar pinnate leaf or frond a feather , wing, or fin or some similar part 2b: the largely cartilaginous projecting portion of the external ear - pin.nal aj