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