Definition of excitant in English:

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excitant

Pronunciation: /ˈɛksɪt(ə)nt/
/ɪkˈsʌɪt(ə)nt/
/ɛkˈsʌɪt(ə)nt/

noun

Biology
A substance which elicits an active physiological or behavioural response: what happens when chemical excitants flood into the brain?
More 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.
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