auricle

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auricle

1. 
a. the upper chamber of the heart; atrium
b. a small sac in the atrium of the heart
2. Anatomy the external part of the ear
3. Biology an ear-shaped part or appendage, such as that occurring at the join of the leaf blade and the leaf sheath in some grasses
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

auricle

[′ȯr·ə·kəl]
(anatomy)
An ear-shaped appendage to an atrium of the heart.
Any ear-shaped structure.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The petrified auricle: Comments on ossification, calcification and exostoses of the external ear.
The aim of this study is to describe the ultrastructure of leaves, ligule, auricles and spikelets accessions of O.
This method is predictable, ensures an acceptable shape of the reconstructed auricle.
Electron microscopy: Samples of the leaf, auricles, ligule and inflorescences were fixed in a 2.5% glutaraldehyde and 2% parafonnaldehyde solution in a 0.1 M sodium phosphate buffer, pH 7.4 (Karnovsky 1965) and were rinsed with the buffer solution.
(4) Other systemic diseases associated with petrified auricles are scleroderma, acromegaly, diabetes mellitus, hypopituitarism, and hypothyroidism.
Sheaths have ligules, auricles are usually absent, and sheath margins are smooth.
Sheaths have ligules, sheath margins are smooth, and auricles are absent.
CP 96-1252 is pubescent along the entire length of the leaf sheath and has short auricles (<1.0 cm).
In the seedling stage, Panterra has rolled leaves and no auricles. Plant stature is relatively short compared with Gulf or TAM 90 forage-type annual ryegrasses but is similar to Axcella turf-type annual ryegrass.
The flag leaves of DW are erect with auricles that are glabrous and blue-green in color.
The flag leaves of Gary are erect with auricles that are glabrous and green to yellow-green in color.