Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
curvilineal is an adjective meaning "characterized by or following a curved line". It carries one recorded sense.
characterized by or following a curved line
“curvilinear tracery”
“curvilinear motion”
Definitions, synonyms and semantic relations for curvilineal come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.