- (n.) One of the divisions of a pinnate part or organ.
- (n.) The auricle of the ear. See Ear.
- (n.) A leaflet of a pinnate leaf. See Illust. of Bipinnate leaf, under Bipinnate.
- (n.) One of the primary divisions of a decompound leaf.
- (n.) Any species of Pinna, a genus of large bivalve mollusks found in all warm seas. The byssus consists of a large number of long, silky fibers, which have been used in manufacturing woven fabrics, as a curiosity.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). pinna. Retrieved September 22, 2026, from http://smartdefine.org/pinna/definitions/2045706 |
| Chicago | Webster's. 2011. "pinna" http://smartdefine.org/pinna/definitions/2045706 (accessed September 22, 2026). |
| Harvard | Webster's 2011, pinna, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/pinna/definitions/2045706>. |
| MLA | Webster's. "pinna" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/pinna/definitions/2045706> |