diaphysectomy

noun
di·a·phy·sec·to·my | \ˌdī-ə-fə-ˈzek-tə-mē, -ˈsek- \
plural diaphysectomies

Medical Definition of diaphysectomy 

: surgical excision of all or part of a diaphysis (as of the clavicle, femur, or fibula)

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