| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| the offspring of a zebra and a donkey. |
| pack rat | |
| —n | |
| Also called: wood rat any rat of the genus Neotoma, of W North America, having a long tail that is furry in some species: family Cricetidae | |