D defs.my
Entry 1 sense Webster, 1913

oncotomy

/(ŏṉ"kŏt*ō̇*my̆)/ · on·cot·o·my · IPA
01 n. The opening of an abscess, or the removal of a tumor, with a cutting instrument.
  1. 1.
    The opening of an abscess, or the removal of a tumor, with a cutting instrument.(Surg.)