Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
pre-jurassic is an adjective meaning "of or relating to or denoting the time before the Jurassic period". It carries one recorded sense.
of or relating to or denoting the time before the Jurassic period
Definitions, synonyms and semantic relations for pre-jurassic come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.