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Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
plethodontidae is a noun meaning "small mostly terrestrial New World salamanders having neither lungs nor gills as adults". It carries one recorded sense.
small mostly terrestrial New World salamanders having neither lungs nor gills as adults
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 plethodontidae come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.