Tooth Definition

teeth, tooths
Any of a set of hard, bonelike structures set in the jaws of most vertebrates and used for biting, tearing, and chewing: a tooth consists typically of a sensitive, vascular pulp surrounded by dentin and coated on the crown with enamel and on the root with cementum: normally 32 are in the permanent set and 20 in the deciduous set of a human.
Webster's New World
Any of various analogous processes in invertebrates.
Webster's New World
Webster's New World
Something resembling a tooth; toothlike part, as on a saw, fork, rake, gearwheel, etc.; tine, prong, cog, etc.
Webster's New World

Appetite or taste for something specified: now only in sweet tooth.

Webster's New World
To provide with teeth.
Webster's New World
To make jagged; indent.
Webster's New World
To mesh, or become interlocked, as gears.
Webster's New World

(structure in the mouth): bicuspid, canine, cuspid, incisor, premolar, molar.

See also tooth.
  • To be actively involved in; get a firm grasp of.
American Heritage
  • To express a readiness to fight; threaten defiantly.
American Heritage
to the teeth
  • Lacking nothing; completely:

    armed to the teeth; dressed to the teeth.

American Heritage
long in the tooth
  • elderly; old
Webster's New World
tooth and nail
  • with all one's strength or resources
Webster's New World

Other Word Forms of Tooth



Idioms, Phrasal Verbs Related to Tooth

Origin of Tooth

  • From Middle English tooth, from Old English tōþ (“tooth"), from Proto-Germanic *tanþs (“tooth"), from Proto-Indo-European *h₃dónts (“tooth"). Cognate with Scots tuth, tuith (“tooth"), North Frisian toth, tos (“tooth"), Dutch tand (“tooth"), German Zahn (“tooth"), Danish and Swedish tand (“tooth"), Icelandic tönn (“tooth"), Welsh dant (“tooth"), Latin dÄ“ns (“tooth"), Lithuanian dantìs (“tooth"), Ancient Greek ὀδούς (odous, odṓn, “tooth"), Armenian Õ¡Õ¿Õ¡Õ´ (atam), Persian دندان (dandân), Sanskrit दत् (dát, “tooth"). Related to tusk.

    From Wiktionary

  • Middle English from Old English tōth dent- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

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