Definition of Pinnate

1. Atrial Fibrillation Slideshow Pictures
2. Bad Bugs and Their Bites Slideshow
3. Understanding Ulcerative Colitis Slideshow

Pinnate: 1. Like the pinna, the part of the ear that projects ("wings out") from the head. 2. Like a feather or leaf with similar parts arranged symmetrically on opposite sides of a central axis.

From the Latin pinnatus meaning winged or feathered, from the Latin pinna meaning a wing or feather.