noun, plural lump·ec·to·mies.

the surgical removal of a breast cyst or tumor.

Origin of lumpectomy

First recorded in 1970–75; lump1 + -ectomy Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for lumpectomy


noun plural -mies

the surgical removal of a tumour in a breast

Word Origin for lumpectomy

C20: from lump 1 + -ectomy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for lumpectomy

1971, from lump (n.), coined on model of mastectomy.

Online Etymology Dictionary, © 2010 Douglas Harper

lumpectomy in Medicine




The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.