UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈbʊlfrɒg/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/ˈbʊlˌfrɑg, -ˌfrɔg/ ,USA pronunciation: respelling(bŏŏlfrog′, -frôg′)

WordReference Random House Learner's Dictionary of American English © 2020
bull•frog /ˈbʊlˌfrɑg, -ˌfrɔg/USA pronunciation   n. [countable]
  1. Reptilesa large North American frog having a deep voice:the constant croaking of the bullfrogs.

WordReference Random House Unabridged Dictionary of American English © 2020
bull•frog  (bŏŏlfrog′, -frôg′),USA pronunciation n. 
  1. Reptilesa large frog, esp. the North American Rana catesbeiana, having a deep voice.
  • 1690–1700, American; bull1 + frog1; so called from its size and voice

Collins Concise English Dictionary © HarperCollins Publishers::
bullfrog /ˈbʊlˌfrɒɡ/ n
  1. any of various large frogs, such as Rana catesbeiana (American bullfrog), having a loud deep croak
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