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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. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
dilemma
in syllogistic, or traditional, logic, any one of several forms of inference in which there are two major premises of hypothetical form and a disjunctive ("either . . . or") minor premise. For example:
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