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1 definition found

From: Webster's Revised Unabridged Dictionary (1913)

 Pin·na n.; pl. Pinnæ E. Pinnas
 1. Bot. (a) A leaflet of a pinnate leaf. See Illust. of Bipinnate leaf, under Bipinnate. (b) One of the primary divisions of a decompound leaf.
 2. Zool. One of the divisions of a pinnate part or organ.
 3.  Zool. 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.
 4. Anat. The auricle of the ear. See Ear.
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