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noun, plural ton·sil·lec·to·mies. Surgery.
  1. the operation of excising or removing one or both tonsils.

Origin of tonsillectomy

1900–05; < Latin tōnsill(ae) tonsils + -ectomy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for tonsillectomy


noun plural -mies
  1. surgical removal of the palatine tonsils
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 tonsillectomy


1899, from tonsil + -ectomy. A hybrid with a Greek ending. A correct formation all from Greek would be amygdalectomy.

Online Etymology Dictionary, © 2010 Douglas Harper

tonsillectomy in Medicine


  1. Surgical removal of tonsils or a tonsil.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

tonsillectomy in Science


  1. Surgical removal of the tonsils.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.