Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
antidotal is an adjective meaning "counteracting the effects of a poison". It carries one recorded sense.
counteracting the effects of a poison
Definitions, synonyms and semantic relations for antidotal come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.