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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. |
| great circle | |
| —n | |
| Compare small circle a circular section of a sphere that has a radius equal to that of the sphere | |
| great circle
A circle on the surface of a sphere whose plane passes through the center of the sphere. The Earth's equator is a great circle on the sphere of the globe. |