'Poll' in the Bible

Thou shalt even take five shekels apiece by the poll, after the shekel of the sanctuary shalt thou take them: (the shekel is twenty gerahs:)

Neither shall they shave their heads, nor suffer their locks to grow long; they shall only poll their heads.

Make thee bald, and poll thee for thy delicate children; enlarge thy baldness as the eagle; for they are gone into captivity from thee.