#activator  any agency bringing about activation; (biology) a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription
  exclusion:  inhibitor
  supertype:  substance__matter  that which has mass and occupies space; "an atom is the smallest indivisible unit of matter"
  subtype:  activating_agent  (mineral extraction) a surface-active chemical used in flotation process to increase the attraction to a specific mineral
  subtype:  accelerator__catalyst  (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
     subtype:  biocatalyst  a biochemical catalyst such as an enzyme
     subtype:  platinum_black  a fine black powder of platinum; used as a catalyst in chemical reactions
  subtype:  sensitizer__sensitiser  (chemistry) a substance other than a catalyst that facilitates the start of a catalytic reaction; (physics) an impurity that augments luminescence in a mineral

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