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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 screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
excision ex·ci·sion (ĭk-sĭzh'ən)
n.
Surgical removal by cutting, as of a tumor or a portion of a structure or organ. Also called exsection.
A recombination event in which a genetic element is removed.