AskDefine | Define eyeteeth

Dictionary Definition

eyeteeth (See eyetooth)
n : one of the four pointed conical teeth (two in each jaw) located between the incisors and the premolars [syn: canine, canine tooth, eye tooth, dogtooth, cuspid] [also: eyeteeth (pl)]

User Contributed Dictionary

English

Noun

eyeteeth
  1. Plural of eyetooth

Extensive Definition

"Cuspid" redirects here. For the heart valves, see bicuspid valve and tricuspid valve.
In mammalian oral anatomy, the canine teeth, also called cuspids, dogteeth, fangs, or (in the case of those of the upper jaw) eye teeth, are relatively long, pointed teeth. However, they can appear more flattened, causing them to resemble incisors and leading them to be called incisiform. They evolved and are used primarily for firmly holding food in order to tear it apart, and occasionally as weapons. They are often the largest teeth in a mammal's mouth. Most species that develop them normally have four per individual, two in the upper jaw and two in the lower, separated within each jaw by its incisors; humans and dogs are examples. In most animals, canines are the anterior-most teeth in the maxillary bone.
The four canines in humans are the two maxillary canines and the two mandibular canines.

Details

There are four canine teeth: two in the upper (maxillary) and two in the lower (mandibular) arch. A canine is placed laterally to each lateral incisor. They are larger and stronger than the incisors, and their roots sink deeply into the bones, and cause well-marked prominences upon the surface.
The crown is large and conical, very convex on its labial surface, a little hollowed and uneven on its lingual surface, and tapering to a blunted point or cusp, which projects beyond the level of the other teeth. The root is single, but longer and thicker than that of the incisors, conical in form, compressed laterally, and marked by a slight groove on each side.
The upper canine teeth (popularly called eye teeth, from their position under the eyes) are larger and longer than the lower, and usually present a distinct basal ridge.
The lower canine teeth (popularly called stomach teeth) are placed nearer the middle line than the upper, so that their summits correspond to the intervals between the upper canines and the lateral incisors.

Sexual dimorphism

With many animals the canine teeth in the upper or lower jaw, or in both, are much larger in the males than in the females, or are absent in the latter, with the exception sometimes of a hidden rudiment. Certain antelopes, the musk-deer, camel, horse, boar, various apes, seals, and the walrus, offer instances.

Additional images

Image:Illu mouth.jpg|Mouth (oral cavity) Image:4Canine_teeth.jpg|Terrier clearly showing all four canines.

References

External links

eyeteeth in Min Nan: Kak-khí
eyeteeth in Catalan: Dent canina
eyeteeth in Corsican: Dente di l'ochju
eyeteeth in German: Eckzahn
eyeteeth in Dhivehi: އަރިމަތީ ދަތް
eyeteeth in Esperanto: Kanino
eyeteeth in French: Canine
eyeteeth in Icelandic: Augntönn
eyeteeth in Italian: Canino (anatomia)
eyeteeth in Dutch: Hoektand
eyeteeth in Japanese: 犬歯
eyeteeth in Norwegian: Hoggtann
eyeteeth in Polish: Kieł
eyeteeth in Portuguese: Canino (dente)
eyeteeth in Serbian: Очњаци
eyeteeth in Finnish: Kulmahammas
eyeteeth in Telugu: రదనికలు
eyeteeth in Chinese: 犬齒
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