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definition of the word tooth

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a tooth

Old English tōþ, from Proto-Germanic *tanþ, *tunþ, from Proto-Indo-European *h₁dont-, *h₁dent- (tooth). Cognate with Gothic 𐍄𐌿𐌽𐌸𐌿𐍃 (tunþus), Danish and Dutch tand, Old High German zan, German Zahn, Latin dens, Greek οδούς, Persian دندان (dandân).



tooth (plural teeth)

  1. A hard, calcareous structure present in the mouth of many vertebrate animals, generally used for eating.
  2. A sharp projection on the blade of a saw or similar implement.
  3. A projection on the edge of a gear that meshes with similar projections on adjacent gears, or on the circumference of a cog that engages with a chain.
  4. (botany) A pointed projection from the margin of a leaf.

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