noun, plural cra·ni·ot·o·mies. Surgery.

the operation of opening the skull, usually for operations on the brain.

Origin of craniotomy

First recorded in 1850–55; cranio- + -tomy Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for craniotomy

Historical Examples of craniotomy

British Dictionary definitions for craniotomy


noun plural -mies

any surgical incision into the skull, esp to expose the brain for neurosurgery
the surgical crushing of a fetal skull to extract a dead fetus
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 craniotomy

1855, from cranio- + -tomy.

Online Etymology Dictionary, © 2010 Douglas Harper

craniotomy in Medicine




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

craniotomy in Science



Surgical incision into the skull.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.