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operating microscope

op·er·at·ing mi·cro·scope (plural op·er·at·ing mi·cro·scopes)


noun 
Definition:
 
optical aid to delicate surgery: a binocular microscope used in surgery when the delicacy of the procedure or the smallness of the parts calls for high magnification. The operating microscope is used in almost all ophthalmic and middle- and inner-ear operations and in many other branches of surgery.

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