Medical Definition of plate
1: a thin relatively flat piece or lamina (as of bone) that is part of the body
2a: a flat glass dish used chiefly for culturing microorganisms; especially : petri dishb: a culture or culture medium contained in such a dish
3: a supporting or reinforcing element: asa: the part of a denture that fits in the mouth; broadly : dentureb: a thin flat narrow piece of metal (as stainless steel) that is used to repair a bone defect or fracture
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