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