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pin·na

 (pĭn′ə)
n. pl. pin·nae (pĭn′ē) or pin·nas
1. Botany A leaflet or primary division of a pinnately compound leaf.
2. Zoology A feather, wing, fin, or similar appendage.
3. Anatomy See auricle.

[Latin, feather; see pet- in Indo-European roots.]

pin′nal adj.

pinna

(ˈpɪnə)
n, pl -nae (-niː) or -nas
1. (Botany) any leaflet of a pinnate compound leaf
2. (Zoology) zoology a feather, wing, fin, or similarly shaped part
3. (Anatomy) another name for auricle2
[C18: via New Latin from Latin: wing, feather, fin]

pin•na

(ˈpɪn ə)

n., pl. pin•nae (ˈpɪn i)
pin•nas.
1. a primary division of a pinnate leaf.
2.
a. a feather, wing, or winglike part.
b. a fin or flipper.
3. the visible portion of the ear that projects from the head.
[1660–70; < Latin: feather, wing, fin]
pin′nal, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pinna - division of a usually pinnately divided leafpinna - division of a usually pinnately divided leaf
leaflet - part of a compound leaf
2.pinna - the externally visible cartilaginous structure of the external earpinna - the externally visible cartilaginous structure of the external ear
ear lobe, earlobe - the fleshy pendulous part of the external human ear
external ear, outer ear - the part of the ear visible externally
tragus - a small cartilaginous flap in front of the external opening of the ear
cauliflower ear - an auricle deformed by injury; common among boxers
cartilaginous structure - body structure given shape by cartilage
Translations

pin·na

n. L. pinna, pabellón de la oreja.
References in periodicals archive ?
All affected dogs were having unilateral swelling on surface of ear pinnae either left or right side, except only one case of female German shepherd presented with bilateral swelling on surface of ear pinna.
The symmetrical pinnae are utilised with Bruel & Kjaer's Head and Torso Simulator (HATS), Types 4128C and D, which consists of a dummy with built-in ear and mouth simulators, to provide a realistic replica of an average, adult human head and torso.
The surface area of each of the pinnae was estimated by measuring its width and height and calculating the area using 1/2 base x height in order to account for the triangular shape of the pinnae.
I have this defect by birth and have no external pinnae nor any hole," he told IBN Live.
Cocos nucifera (Coconut Palm) is a large palm, growing up to 30 m (98 ft) tall, with pinnate leaves 4-6 m (13-20 ft) long, and pinnae 60-90 cm long.
Lesions in horses are solitary or multiple nodules that are often ulcerated and most commonly occur on the head, pinnae, legs, and neck.
globulifera, which it resembles in some of its vegetative characteristics, particularly the columnar to narrow volcano-shaped glands on the rachis between each pair of pinnae.
Palm height was measured with a telescopic pole (to 7 m long) and size of stem, leaves, pinnae and spines with a tape-measure (to 3 m long).
And that would make me very hesitant to cry radiation just because one baby bunny is missing his external ear pinnae," Dana Krempels, from the US-based House Rabbit Society, said.
5 mm long, armed only toward the base with a few bicolor spines to 2 cm; pinnae 8-13 on each side, subregularly arranged in one plane, except for a basal group of five rather closely arranged pinnae, middle pinnae separated 7-11 cm, plicate, narrowly cuneate to almost linear, 4-13 times as long as wide, oblique to incised-premorse at apex, often with a 1-3 cm long finger-like projection on the distal margin, adaxially glabrous, abaxially sparsely and minutely pilose, and with a narrow marginal strip of brown scales, mostly along the distal margin, without spinules or spines; basal pinnae 12-18 x 0.
The taxa with petiolulate pinnae, lamina and axis with abundant indument, and bulbils or aerophores in the raquis, were separated from the B.
Trailing or climbing by a twining rachis; fronds 1 to several meters long, pinnately divided; sporangia marginal on fingerlike projections developing from the pinnae margins.