pinna definition

  • noun:
    • Botany A leaflet or main unit of a pinnately ingredient leaf.
    • Zoology A feather, wing, fin, or comparable appendage.
    • Anatomy See auricle.
    • The noticeable part of the ear that resides outside the mind, the auricle.
    • A leaflet or primary segment of a pinnate mixture leaf.
    • A feather, wing, fin, or other comparable appendage.
    • A leaflet of a pinnate leaf. See Illust. of Bipinnate leaf, under bipinnate.
    • One of the primary divisions of a decompound leaf.
    • among divisions of a pinnate component or organ.
    • Any species of Pinna, a genus of huge bivalve mollusks found in all cozy seas. The byssus is comprised of a lot of long, silky materials, which have been used in production woven materials, as a curiosity.
    • The auricle associated with ear. See Ear.
    • In anat. and zoöl.:
    • A feather. See penna.
    • A bird's wing. See pinion.
    • A fish's fin: the most common technical name.
    • Some wing-like or fin-like component or organ, once the flipper of a seal or cetacean.
    • The outer ear, which projects through the mind; the auricle, or pavilion regarding the ear. See cut under ear.
    • The nostril, or wing of nostrils.
    • the smaller limbs of some polyps, as plumularians.
    • In entomology, a tiny oblique ridge creating the outlines of a pinnate surface. See pinnate.
    • In botany, one of several primary divisions of a pinnate leaf: used most commonly to ferns.
    • the alæ nasi; the nostrils.
    • A genus of bivalves, typical of this household Pinnidæ.
    • [l. c] A bivalve mollusk associated with the genus Pinna.
    • the externally visible cartilaginous construction associated with the external ear
    • unit of a usually pinnately split leaf

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