Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
cross-sectional is an adjective meaning "of or relating to a cross section". It carries 2 recorded senses.
of or relating to a cross section
“a cross-sectional slice”
representing a plane made by cutting across something at right angles to its length
“cross-section views of the neck”
Definitions, synonyms and semantic relations for cross-sectional come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.