Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
perinatal is an adjective meaning "occurring during the period around birth (5 months before and 1 month after)". It carries one recorded sense.
Definitions, synonyms and semantic relations for perinatal come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.