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