tooth

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[edit] English

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a tooth

[edit] Etymology

From Middle English tooth, from Old English tōþ (tooth), from Proto-Germanic *tanþs (tooth), from Proto-Indo-European *h₃dónts (tooth). Cognate with North Frisian toth, tos (tooth), Dutch tand (tooth), German Zahn (tooth), Danish and Swedish tand (tooth), Icelandic tönn (tooth), Welsh dant (tooth), Latin dēns (tooth), Lithuanian dantìs (tooth), Ancient Greek ὀδούς (odous, odṓn, tooth), Armenian ատամ (atam), Persian دندان (dandân), Sanskrit  (dánt, tooth). Related to tusk.

[edit] Pronunciation

[edit] Noun

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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