pinna

pin·na

P0317000 (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 -nas1. (Botany) any leaflet of a pinnate compound leaf2. (Zoology) zoology a feather, wing, fin, or similarly shaped part3. (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.

Thesaurus

Noun	1.	pinna - division of a usually pinnately divided leafpinnuleleaflet - part of a compound leaf
	2.	pinna - the externally visible cartilaginous structure of the external earauricle, earear lobe, earlobe - the fleshy pendulous part of the external human earexternal ear, outer ear - the part of the ear visible externallytragus - a small cartilaginous flap in front of the external opening of the earcauliflower ear - an auricle deformed by injury; common among boxerscartilaginous structure - body structure given shape by cartilage

Translations

Ohrmuschelушная раковина

pinna

1. any leaflet of a pinnate compound leaf 2. Zoology a feather, wing, fin, or similarly shaped part 3. another name for auricle

Pinna

(also auricle or auricula), the external part of the human and mammalian auditory analyser, consisting of elastic cartilage and a skin covering. The cartilage determines the pinna’s shape and its various elevations and depressions, such as the helix (the pinna’s incurved margin), the antihelix (located parallel to the helix), the tragus (the anterior protuberance), the antitragus (located behind the tragus), and the fossa triangularis. The lobe has no cartilage. Deep within the pinna, directly behind the tragus, is the opening of the external auditory canal. The pinna’s skin is covered with minute hairs and contains sebaceous and sudoriferous glands.

In some mammals, the pinna is endowed with special musculature and is capable of movement; in others, individual parts of the pinna are capable of movement; and in still others, for example, humans, movement is severely limited. The pinna is secondarily simplified or completely reduced in many aquatic mammals, such as whales, manatees, seals, and walruses, and in many burrowing animals, such as desmans and moles. It is well developed in nocturnal animals, for example, bats, in some forest ungulates, and in desert canids.

The pinna has many functions. It receives sound and amplifies or reflects it according to frequency. It makes possible the determination of the spatial location of a sound source. It also protects the auditory organs from mechanical injury during digging and diving, as well as from excessive noise, by means of special protective hairs, by the overlapping of the auditory canal, or by the involution of the entire pinna, as in some bats.

G. N. SIMKIN

pinna

[′pin·ə] (anatomy) The cartilaginous, projecting flap of the external ear of vertebrates. Also known as auricle.

pinna

auricle

[aw´rĭ-k'l] 1. the projecting part of the ear lying outside the head; called also pinna.

Auricle.2. the ear-shaped appendage of either atrium of the heart; formerly used to designate the entire atrium" >atrium.

pin·na

, pl.

pin·nae

(pin'ă, pin'ē), 1. ☆ official atlternate term for auricle2. A feather, wing, or fin. 3. In veterinary anatomy, the moveable cartilage and associated fleshy structures of the ear located externally, outside the vertical ear canal. [L. pinna or penna, a feather, in pl. a wing]

pinna

(pĭn′ə)n. pl. pinnae (pĭn′ē) or pinnas 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.

pin′nal adj.

pin·na

, pl. pinnae (pin'ă, -ē) 1. Synonym(s): auricle (1) . 2. A feather, wing, or fin. [L. pinna or penna, a feather, in pl. a wing]

pinna

The visible external ear. The pinna consists of a skin flap on a skeleton of cartilage. It has comparatively little effect on the acuity of hearing. Also known as the auricle.

pinna

the primary division of a leaf.
a wing or fin.
the projecting part of the external ear of mammals.

pin·na

, pl. pinnae (pin'ă, -ē) 1. Synonym(s): auricle (1) . 2. A feather, wing, or fin. [L. pinna or penna, a feather, in pl. a wing]

pinna

Related to pinna: auditory canal

noun

Synonyms for pinna

noun division of a usually pinnately divided leaf

Synonyms

pinnule

Related Words

leaflet

noun the externally visible cartilaginous structure of the external ear

Synonyms

auricle
ear

Related Words

ear lobe
earlobe
external ear
outer ear
tragus
cauliflower ear
cartilaginous structure