EXCITANT
excitant, excitative, excitatory
(adjective) (of drugs e.g.) able to excite or stimulate
stimulant, stimulant drug, excitant
(noun) a drug that temporarily quickens some vital process
Source: WordNet® 3.1
Adjective
excitant (comparative more excitant, superlative most excitant)
exciting; stimulating
Noun
excitant (plural excitants)
Something that excites or stimulates; a stimulant
Source: Wiktionary
Ex*cit"ant, a. Etym: [L. excitans, -antis, p. pr. of excitare: cf. F.
excitant.]
Definition: Tending to excite; exciting.
Ex*cit"ant, n. (Physiol.)
Definition: An agent or influence which arouses vital activity, or produces
increased action, in a living organism or in any of its tissues or
parts; a stimulant.
Source: Webster’s Unabridged Dictionary 1913 Edition