Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
excitatory is an adjective meaning "(of drugs e.g.) able to excite or stimulate". It carries one recorded sense.
(of drugs e.g.) able to excite or stimulate
Definitions, synonyms and semantic relations for excitatory come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.