Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
plagianthus is a noun meaning "small genus of shrubs and trees of Australia and New Zealand". It carries one recorded sense.
small genus of shrubs and trees of Australia and New Zealand
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for plagianthus come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.