Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
isoetaceae is a noun meaning "quillworts; coextensive with the genus Isoetes". It carries one recorded sense.
quillworts; coextensive with the genus Isoetes
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 isoetaceae come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.