Tragus

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tragus

[′trā·gəs]
(anatomy)
The prominence in front of the opening of the external ear.
One of the hairs in the external ear canal.

Tragus

 

(1) In man and other mammals, the fold or prominence at the base of the pinna. The tragus is maximally developed in some bats. It is possible that the tragus serves as a supplementary screen to concentrate and direct the sound reaching the ear. When maximally developed, the tragus is part of the spatial hearing mechanism and helps to amplify the biologically most important sound frequencies.

(2) In birds, the tragus is the pyramidal bony or cartilaginous prominence at the junction of the inner bronchial walls (inferior larynx). It is possible that it may be used in sound transmission.


Tragus

 

a genus of annual or perennial herbs of the family Gramineae. The stems are spread out at the base and take root at the nodes. The leaf blades are stiff, short, and usually flat. The inflorescence is a spicate panicle with very short branches; the spikelets are one-flowered. The leathery upper glume, which is equal to the spikelet in length, has large, hooked thorns along the veins. There are six to ten species, distributed in subtropical, tropical, and warm-temperate regions of both hemispheres. The plants occur mainly in Africa. The USSR has one species, T. racemosus. An introduced plant, it is found in the southern European USSR, the Caucasus, and Middle Asia. T. racemosus grows in sandy and gravelly places, on rocky slopes, along roads, and as a weed in fields.

References in periodicals archive ?
Our patient had accessory tragi as a presenting feature which can also be found in various other syndromes like Trecher-Collins syndrome, Wolf-Hirschhorn syndrome, Nager's acrofacial dysostosis, Wildervanck syndrome, Townes-Brocks Syndrome and Delleman syndrome.
Multiple accessory tragi as a clue to the diagnosis of the oculo- auriculo-vertebral (Goldenhar) syndrome.
Essentially pessimistic about the human condition, he used tragi - comedy or comedy as a foil for his evident despair.