Pocket mouse Meaning, Definition & Usage

  1. noun any of various small nocturnal burrowing desert rodents with cheek pouches and long hind legs and tail

WordNet

Definitions
  1. (Zoöl.), any species of American mice of the family Saccomyidæ. They have external cheek pouches. Some of them are adapted for leaping (genus Dipadomys), and are called kangaroo mice. They are native of the Southwestern United States, Mexico, etc.

Webster 1913