Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
tripinnated is an adjective meaning "(of a leaf shape) thrice pinnate". It carries one recorded sense.
(of a leaf shape) thrice pinnate
Definitions, synonyms and semantic relations for tripinnated come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.