Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
saturniidae is a noun meaning "important and widely distributed family of moths including some of the largest insects known". It carries one recorded sense.
important and widely distributed family of moths including some of the largest insects known
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 saturniidae come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.