Search Result for "pinnas": 

The Collaborative International Dictionary of English v.0.48:

Pinna \Pin"na\, n.; pl. Pinn[ae], E. Pinnas. [L., a feather.] 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. [1913 Webster] 2. (Zool.) One of the divisions of a pinnate part or organ. [1913 Webster] 3. [L. pinna, akin to Gr. ?.] (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. [1913 Webster] 4. (Anat.) The auricle of the ear. See Ear. [1913 Webster]