Pinion is a round gear, usually the smaller of two meshed gears.
Pinion may also refer to:
Birds Pinion (feather), an outermost primary flight feather on a bird's wing Pinioning, the act of surgically removing a bird's pinion joint
People Bradley Pinion (born 1994), American football punter Joe Pinion (born 1983), American politician Offutt Pinion (1924–1961), American sport shooter
Places Pinion, Arizona Pinion Rock
Taxonomy Pinyon (or pinion, piñon), a group of pines Pinion (moth), a number of moths mostly in the family Noctuidae
Other uses "Pinion", an instrumental song by Nine Inch Nails from the 1992 EP Broken