Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
crop-dusting is a noun meaning "the dispersion of fungicides or insecticides or fertilizer on growing crops (often from a low-flying aircraft)". It carries one recorded sense.
the dispersion of fungicides or insecticides or fertilizer on growing crops (often from a low-flying aircraft)
aircraft
Definitions, synonyms and semantic relations for crop-dusting come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.