Noun

• S: (n) activator ((biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription)
• direct hyponym / full hyponym
• S: (n) activating agent ((mineral extraction) a surface-active chemical used in flotation process to increase the attraction to a specific mineral)
• S: (n) catalyst, accelerator ((chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected)
• S: (n) sensitizer, sensitiser ((chemistry) a substance other than a catalyst that facilitates the start of a catalytic reaction)
• domain category
• direct hypernym / inherited hypernym / sister term
• antonym
• derivationally related form
• W: (v) activate [Related to: activator] (make active or more active) "activate an old file"