Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
duckbill is a noun and adjective meaning "primitive fish of the Mississippi valley having a long paddle-shaped snout". It carries 3 recorded senses.
primitive fish of the Mississippi valley having a long paddle-shaped snout
small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for duckbill come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.