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the projecting outer portion of the ear; pinna.
Also called auricular appendage. an ear-shaped appendage projecting from each atrium of the heart.
(loosely) the atrium.

Botany, Zoology. a part like or likened to an ear.
Historical Examples

The superior and inferior venæ cavæ are busily filling the auricle with dark, impure blood.
A Practical Physiology Albert F. Blaisdell

It contains one auricle and one ventricle only, not two of each as in man.
A Guide to the Study of Fishes, Volume 1 (of 2) David Starr Jordan

B, is the right sinus, or auricle, into which the returned blood is poured.
A Treatise on Domestic Economy Catherine Esther Beecher

The extrasystole may have its origin in either the auricle or the ventricle.
Arteriosclerosis and Hypertension: Louis Marshall Warfield

The auricle may contract twice as often as the ventricle, and the pulse may be regular or markedly irregular.
The Ethics of Medical Homicide and Mutilation Austin O’Malley

The auricle and ventricle on each side are completely separated.
Disease and Its Causes William Thomas Councilman

The absence of the auricle, as the result of accident or injury, does not cause diminution of hearing.
Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 Various

In animals with cold blood, (as fishes,) the heart is single, having but one auricle and one ventricle.
A Treatise on Domestic Economy Catherine Esther Beecher

The heart is modified to form two pulsating cavities, auricle and ventricle.
A Guide to the Study of Fishes, Volume 1 (of 2) David Starr Jordan

Such a condition may be readily produced in a dog’s exposed heart by direct faradization of the auricle.
Arteriosclerosis and Hypertension: Louis Marshall Warfield


the upper chamber of the heart; atrium
a small sac in the atrium of the heart

(anatomy) Also called pinna. the external part of the ear
(biology) Also called auricula. an ear-shaped part or appendage, such as that occurring at the join of the leaf blade and the leaf sheath in some grasses

part of the ear, 1650s, from Latin auricula “ear,” diminutive of auris (see ear (n.1)). As a chamber of the heart, early 15c., from Latin, so called from a perceived similarity in shape to an animal’s ear.

auricle au·ri·cle (ôr’ĭ-kəl)

Atrial auricle.

The projecting shell-like structure on the side of the head constituting, with the external acoustic meatus, the external ear. Also called pinna.


The visible part of the outer ear.

An atrium of the heart.


Read Also:

  • Auricle atrialis

    auricle atrialis auricle atrialis auricle a·tri·a·lis (ā’trē-ā’lĭs) n. Atrial auricle.

  • Auricula

    noun (pl) -lae (-ˌliː), -las Also called bear’s-ear. a widely cultivated alpine primrose, Primula auricula, with leaves shaped like a bear’s ear another word for auricle (sense 3) Historical Examples A genus proposed by Lamarck, to include the small, conical species of auricula, which have the outer lip simple. A Conchological Manual George Brettingham Sowerby […]

  • Auricula atrii

    auricula atrii auricula atrii auricula a·tri·i (ā’trē-ī’) n. See atrial auricle.

  • Auricular

    of or relating to the ear or to the sense of hearing; aural. perceived by or addressed to the ear; made in private: an auricular confession. dependent on hearing; understood or known by hearing: auricular evidence. shaped like an ear; auriculate. Anatomy. pertaining to an of the heart. Ornithology. pertaining to certain often modified feathers […]

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