Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
nonsegmental is an adjective meaning "having a body that is not divided into segments". It carries one recorded sense.
having a body that is not divided into segments
“unsegmented worms”
zoology
Definitions, synonyms and semantic relations for nonsegmental come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.