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| 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. |
| Paleogene (pā'lē-ə-jēn') Pronunciation Key
The oldest of two subdivisions of the Tertiary Period, including the Paleocene, Eocene, and Oligocene Epochs. |