thoraco-

Also especially before a vowel, thorac-.

Origin of thoraco-

combining form representing Greek thōrāk- (stem of thṓrāx) chest; see -o-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for thoraco-

thoraco-

before a vowel thorac-

combining form
  1. thoraxthoracotomy
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

thoraco- in Medicine

thoraco-

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