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mudpuppy

[muhd-puhp-ee]
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noun, plural mud·pup·pies.
  1. any of several often large, aquatic salamanders of the genus Necturus, of eastern North America, having bushy, red gills and well-developed limbs.
  2. any of several North American salamanders of the genus Ambystoma.
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Origin of mudpuppy

An Americanism dating back to 1880–85; mud + puppy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for mud puppy

mud puppy

noun
  1. any aquatic North American salamander of the genus Necturus, esp N. maculosus, having red feathery external gills and other persistent larval features: family ProteidaeSee also neoteny
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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