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The Collaborative International Dictionary
Tragus

Tragus \Tra"gus\, n. [NL., fr. Gr. ? a part of the inner ear.] (Anat.) The prominence in front of the external opening of the ear. See Illust. under Ear.

Douglas Harper's Etymology Dictionary
tragus

"eminence at the opening of the ear," 1690s, Modern Latin, from Greek tragos in this sense (Rufus of Ephesus), properly "he-goat;" so called for the tuft of hair which grows there, which resembles a goat's beard.

Wiktionary
tragus

n. (context anatomy English) The small piece of thick cartilage of the external ear that is immediately in front of the ear canal.

WordNet
tragus
  1. n. a small cartilaginous flap in front of the external opening of the ear

  2. [also: tragi (pl)]

Wikipedia
Tragus (ear)

The tragus is a small pointed eminence of the external ear, situated in front of the concha, and projecting backward over the meatus. It also is the name of hair growing at the entrance of the ear. Its name comes from the Greek: tragos, goat, and is descriptive of its general covering on its under surface with a tuft of hair, resembling a goat's beard. The nearby antitragus projects forwards and upwards.

Because the tragus faces rearwards, it aids in collecting sounds from behind. These sounds are delayed more than sounds arriving from the front, assisting the brain to sense front vs. rear sound sources.

In a positive fistula test (for the presence of a fistula from cholesteatoma to the labyrinth), pressure on the tragus causes vertigo or eye deviation by inducing movement of perilymph.

Tragus (plant)

Tragus, commonly called bur gras, burr grass or carrot-seed grass, is a genus of plants in the grass family. It is native to Eurasia, Africa, Australia, and Eurasia with several species on islands in the Atlantic, Indian, and Pacific Oceans plus one species in Argentina.

Plants are monoecious, stoloniferous, and either annual or perennial depending on the species. The genus has been introduced in subtropical and tropical areas around the world as weeds of disturbed areas. The culms (stems) are ascending or low and mat forming, glabrous, and circular in cross-section. Blades are flat or folded and linear, ligules membraneous and trichomatous. Flowers are born in narrow panicles; the primary branches are spirally arranged, each possessing 2-5 spikelets; each of these spikelets bears a single floret. Each floret has 3 stamens, the anthers of which are pale yellow. The caryopses (grains) are elliptical and golden-brown.

Four species of Tragus have been introduced to North America: T. australianus, T. berteronianus, T. heptaneuron, and T. racemosus. The natural chromosome count is 2n = 20 in T. berteronianus, and 2n = 40 in T. racemosus. Tragus species utilize C photosynthesis. They prevent erosion, but make for poor grazing and in larger numbers indicate overgrazing.

Species
  1. Tragus andicola - Argentina ( Catamarca, Jujuy, Salta, Tucuman)
  2. Tragus australianus - Australia, New Caledonia
  3. Tragus berteronianus - Africa, Arabian Peninsula, Iran, Afghanistan, Pakistan, China; introduced in North America, West Indies, South America
  4. Tragus heptaneuron - Somalia, Kenya, Tanzania
  5. Tragus koelerioides - Zimbabwe, Namibia, Botswana, Lesotho, South Africa
  6. Tragus mongolorum - Mongolia, China, Indian Subcontinent, Indochina, Madagascar, Mauritius, RĂ©union
  7. Tragus pedunculatus - Namibia, Botswana
  8. Tragus racemosus - Africa + Eurasia from France and Canary Islands to South Africa to Kazakhstan
formerly included

several species now regarded as better suited to other genera: Brachypodium Bromus Festuca Leptothrium Lolium Pseudechinolaena

Tragus

Tragus can mean:

  • Hieronymus Bock's Latinized name
  • Tragus (ear), a small pointed eminence of the outer ear
  • Tragus (plant), a genus of grass
  • Tragus (river), a river of Arcadia, Ancient Greece
  • Tragus Ltd., a UK limited company operating restaurants
  • Tragus piercing, a type of ear piercing
Tragus (river)

The Tragus or Tragos ( Greek: ) is a river of Arcadia, Greece described by the ancient author Pausanias. Pausanias says the river issues from the inner side of the embankment surrounding the city of Caphyae near lake Orchomenus, after which it descends into a chasm of the earth, issuing again at a place called Nasi ; and that the name of the village where it issues is named Rheunus . The Tragus has been identified with the modern Tara River or with the modern Daraiiko

Usage examples of "tragus".

She was delivered of a normal living child, with the exception that the helix of the left ear was pushed anteriorly, and had, in its middle, a deep incision, which also traversed the antihelix and the tragus, and continued over the cheek toward the nose, where it terminated.

Warner, in a report of the examination of 50,000 children, quoted by Ballantyne, describes 33 with supernumerary auricles, represented by sessile or pedunculated outgrowths in front of the tragus.

Junior actually raised his trembling left hand to his ear, expecting to find the quarter tucked in the auditory canal, held between the tragus and the antitragus, waiting to be plucked with a flourish.