pickerel frog

noun
  1. a meadow frog, Rana palustris, common in eastern North America, similar to the leopard frog but with squarish dark spots on the back.

Origin of pickerel frog

An Americanism dating back to 1830–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018