Medical Dictionary
activator
noun ac·ti·va·tor \ˈak-tə-ˌvāt-ər\
Medical Definition of ACTIVATOR
1
: a substance (as a chloride ion) that increases the activity of an enzyme—compare coenzyme
2
: a substance given off by developing tissue that stimulates differentiation of adjacent tissue; also : a structure giving off such a stimulant
Seen & Heard
What made you want to look up activator? Please tell us where you read or heard it (including the quote, if possible).