tooth

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tooth
  • noun
    Each of a set of hard, bony enamel-coated structures in the jaws of most vertebrates, used for biting and chewing. (he clenched his teeth)
    A projecting part on a tool or other instrument, especially one of a series that function or engage together, such as a cog on a gearwheel or a point on a saw or comb. (Desargues proposed cycloidal teeth for gear wheels in the 1630's.)
    An appetite or liking for a particular thing.
    Roughness given to a surface to allow color or glue to adhere. (the paper used in copying machines is good as it has tooth and takes ink well)

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