Definitions from Wiktionary (activator)

▸ noun:  One who, or that which, activates.
▸ noun:  (physical chemistry) Something that activates a catalyst
▸ noun:  (biology) Any chemical or agent which regulates one or more genes by increasing the rate of transcription.
▸ noun:  (biology) A type of effector that increases the rate of enzyme-mediated reactions.
▸ noun:  A type of dopant used in phosphors and scintillators.
▸ noun:  (mining) An agent that enables the flotation of a mineral or minerals.
▸ noun:  (chiropractic) A hand-held device that delivers a controlled fast thrust to a joint, muscle, etc., to help stimulate nervous system activity.
▸ Also see activator

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