[boo l-frog, -frawg]
See more synonyms for bullfrog on Thesaurus.com

Origin of bullfrog

1690–1700, Americanism; bull1 + frog1; so called from its size and voice
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for bullfrog

toad, bullfrog, croaker, caecilian, polliwog

Examples from the Web for bullfrog

Historical Examples of bullfrog

British Dictionary definitions for bullfrog


  1. any of various large frogs, such as Rana catesbeiana (American bullfrog), having a loud deep croak
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for bullfrog

also bull-frog, 1738, from bull (n.1) + frog (n.1). So called for its voice.

Online Etymology Dictionary, © 2010 Douglas Harper