Definition of excitant in English:

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Pronunciation: /ikˈsītnt/


A substance that elicits an active physiological or behavioral response.
Example sentences
  • Some people find that coffee brings out tremor; this is due to the presence of caffeine, which is an excitant; these effects are not, however, universal.
  • The resulting synaptic inhibition is characterized by either a depressant or an excitant effect, depending on the population of cells involved.


Early 17th century: perhaps suggested by French excitant.

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