oblique amputation
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ob·lique am·pu·ta·tion
amputation in which the line of section through a limb is at other than a right angle; this yields an oval appearance to the cut surface (hence sometimes, though rarely, referred to as an oval amputation).
ob·lique am·pu·ta·tion
(ō-blēk' amp'yū-tā'shŭn)Amputation in which the line of section through an extremity is at other than a right angle; this yields an oval appearance to the cut surface.