Definitions
1.nounThe head of a pin. (Frequently used in size comparisons.)
2.nounAn ignorant, naive, foolish, or stupid person.
3.nounA telemark skier.
4.nounA human head that is unusually tapered or small, often due to microcephaly, or a person with that trait. Often promoted in freak shows as "human pinheads".
5.noun(pet stores) A newborn cricket used as food for pets.
6.noun(mycoculture) The immature juvenile fruiting body of a mushroom prior to its gills opening.