tooth

1. (zoology) A projection or point in other parts of the body resembling the tooth of a vertebrate animal.Examples: "Species XXXVI. Obliquaria bullata— (Unio bullata) […] Found at the falls of Ohio; rare; breadth almost two inches; cardinal and lamellar teeth like preceding species; apices rounded, decorticated, but not truncated"

2. (botany) A pointed projection from the margin of a leaf.

3. (animation) The rough surface of some kinds of cel or other films that allows better adhesion of artwork.

4. (figurative) Liking, fondness (compare toothsome).Examples: "I have a sweet tooth: I love sugary treats."; "These are not dishes for thy dainty tooth"Synonyms: fondness, appetite, taste, palatefiguratively

5. (algebraic geometry) An irreducible component of a comb that intersects the handle in exactly one point, that point being distinct from the unique point of intersection for any other tooth of the comb.