lump·ec·to·my (lŭm-pěk'tə-mē) n.
pl.lump·ec·to·mies Surgical excision of a tumor from the breast with the removal of a minimal amount of surrounding tissue.
Main Entry: lump·ec·to·my Pronunciation: "l&m-'pek-t&-mE Function: noun Inflected Form: plural-mies : excision of a breast tumor with a limited amount of associated tissue called also tylectomy; —compare QUADRANTECTOMY