1) Family heteromyidae 2) Mammal family 
Heteromyidae is a family of rodents comprised by kangaroo rats, kangaroo mice, and pocket mice. Most heteromyids live in complex burrows within the deserts and grasslands of western North America, though species within the genera Heteromys and Liomys are also found in forests and their range extends down as far as northern South America. They feed...
(from the article `pocket mouse`) Pocket mice are classified in the family Heteromyidae, meaning `different mouse,` or `other mouse,` in Greek. This family also includes kangaroo rats ...
[n] - small New World burrowing mouselike rodents with fur-lined cheek pouches and hind limbs and tail adapted to leaping
family Heteromyidae noun small New World burrowing mouselike rodents with fur-lined cheek pouches and hind limbs and tail adapted to leaping; adapted to desert conditions: pocket mice; kangaroo mice; kangaroo rats