chuck

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Nursing An absorbent disposable napkin covered on one side by plastic, which may be placed under a patient with incontinence
Pathology A round or square flat metal grid on which tissue is placed in a cryostat as a solid support for cutting frozen sections

chuck

(chŭk)
A clamp or fastener that secures a moving part of a tool, or the object being worked on.

chuck

a hand grip to be attached to intramedullary pins to enable the surgeon to rotate or drive them into bone.