suppressant

[ suh-pres-uh nt ]
/ səˈprɛs ənt /

noun

a substance that suppresses an undesirable action or condition: an appetite suppressant.

Origin of suppressant

1940–45; supress + -ant

British Dictionary definitions for suppressant

suppressant
/ (səˈprɛsənt) /

adjective

tending to suppress or restrain an action or condition

noun

a suppressant drug or agent a cough suppressant