-zə(r) noun
( -s )
: one that neutralizes: as
a. : any of various devices that neutralize or eliminate some unwanted or side effect (as static from radio, excess acidity from a solution)
b. : a worker who neutralizes something (as a product of acid hydrolysis by suitable treatment with a base) as his regular work
c. : a worker who cleans metal objects in an acid bath
d. : a chemical solution used to terminate the action of a permanent waving solution
e. : clocker I 3