Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
cyclonal is an adjective meaning "of or relating to or characteristic of the atmosphere around a low pressure center". It carries 2 recorded senses.
of or relating to or characteristic of the atmosphere around a low pressure center
“cyclonic cloud pattern”
meteorology
of or relating to or characteristic of a violent tropical storm
“cyclonic destruction”
Definitions, synonyms and semantic relations for cyclonal come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.