bullfrog

from WordNet (r) 3.0 (2006)

bullfrog
    n 1: largest North American frog; highly aquatic with a deep-
         pitched voice [syn: {bullfrog}, {Rana catesbeiana}]

from The Collaborative International Dictionary of English v.0.48

Bullfrog \Bull"frog`\, n. (Zool.)
   A very large species of frog ({Rana Catesbiana}), found in
   North America; -- so named from its loud bellowing in spring.
   [1913 Webster]

from U.S. Gazetteer (1990)

Bullfrog, UT
  Zip code(s): 84533

[email protected]