Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
catarrhal is an adjective meaning "of or relating to a catarrh". It carries one recorded sense.
of or relating to a catarrh
“catarrhal fever is any of several respiratory or oral diseases of livestock such as bluetongue in horses and sheep”
Definitions, synonyms and semantic relations for catarrhal come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.