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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. |
| a scrap or morsel of food left at a meal. |
preceptor pre·cep·tor (prĭ-sěp'tər, prē'sěp'tər)
n.
An expert or a specialist, such as a physician, who gives practical experience and training to a student, especially of medicine or nursing.