Corrector
CORRECTOR, noun
1. One who corrects; one who amends faults, retrenches error, and renders conformable to truth or propriety, or to any standard; as a corrector of the press; a corrector of abuses.
2. One who punishes for correction; one who amends or reforms by chastisement, reproof or instruction.
3. That which corrects; that which abates or removes what is noxious or inconvenient; an ingredient in a composition which abates or counteracts the force of another; as, an alkali is a corrector of acids.
Turpentine is a corrector of quicksilver.