jumping mouse

from The American Heritage® Dictionary of the English Language, 4th Edition

• n. Any of various small Eurasian and North American rodents of the family Zapodidae, having a very long tail and long hind legs.

from the GNU version of the Collaborative International Dictionary of English

• adj. North American mouse (Zapus Hudsonius), having a long tail and large hind legs. It is noted for its jumping powers. Called also kangaroo mouse.

from The Century Dictionary and Cyclopedia

• n. Same as deer-mouse

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• n. any of several primitive mouselike rodents with long hind legs and no cheek pouches; of woodlands of Eurasia and North America