Definition of "pocket mouse" []

• Any of various small, nocturnal North American burrowing rodents of the genus Perognathus, related to the kangaroo rat and having fur-lined external cheek pouches, small ears, and a long tail. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.