This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Botany A leaflet or primary division of a pinnately compound leaf.

n. Zoology A feather, wing, fin, or similar appendage.

n. Anatomy See auricle.

n. The visible part of the ear that resides outside of the head, the auricle.

n. A leaflet or primary segment of a pinnate compound leaf.

n. A feather, wing, fin, or other similar appendage.

n.

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. One of the divisions of a pinnate part or organ.

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.

n. The auricle of the ear. See Ear.

n. In anat. and zoöl.:

n. A feather. See penna.

n. A bird's wing. See pinion.

n. A fish's fin: the usual technical name.

n. Some wing-like or fin-like part or organ, as the flipper of a seal or cetacean.

n. The outer ear, which projects from the head; the auricle, or pavilion of the ear. See cut under ear.

n. The nostril, or wing of the nose.

n. One of the smaller branches of some polyps, as plumularians.

n. In entomology, a small oblique ridge forming one of the lines of a pinnate surface. See pinnate.

n. In botany, one of the primary divisions of a pinnate leaf: applied most commonly to ferns.

n. the alæ nasi; the nostrils.

n. A genus of bivalves, typical of the family Pinnidæ.

n. [l. c] A bivalve mollusk of the genus Pinna.

n. the externally visible cartilaginous structure of the external ear

n. division of a usually pinnately divided leaf

"“And after all, didn’t somebody just make up the word pinna, too?”"

leaflet   

pinna marina    dilatator pinnæ   

pinnae    bipinnate    ear   

pinnal    pinnule    pinnate    pinniped   

navis    inke    biro    hortus    ink-pot    inkhorn    crinkling    paper    Nibelungenlied    exogamy