Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
psilophytales is a noun meaning "Paleozoic simple dichotomously branched plants of Europe and eastern Canada including the oldest known vascular land plants". It carries one recorded sense.
Paleozoic simple dichotomously branched plants of Europe and eastern Canada including the oldest known vascular land plants
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 psilophytales come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.