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