noun
tooth
tooth
noun
1
A hard structure in the mouth used for biting and chewing.
"She lost a baby tooth at school today."
"The dentist found a cavity in his back tooth."
2
A sharp, pointed projection, as on a saw, gear, or comb.
"One of the teeth on the saw blade was chipped."
How to Use Tooth
Learner’s notesIn plain EnglishThe hard, white structures in your mouth for chewing, or, by extension, any similar pointed projection on a tool or object.
Common pairings
brush your teeth
sweet tooth
teeth on a gear
long in the tooth
Word Forms
toothed past tense, teeth plural, tooths singular
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Etymology
From Old English toth, from a Proto-Germanic root, ultimately from a Proto-Indo-European word for "tooth" — a doublet of "dent" and "dens," and related to "tusk."