stereo-

  1. a combining form borrowed from Greek, where it meant “solid”, used with reference to hardness, solidity, three-dimensionality in the formation of compound words: stereochemistry; stereogram; stereoscope.
Also especially before a vowel, stere-.

Origin of stereo-

From the Greek word stereós
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for stereo-

stereo-

sometimes before a vowel stere-

combining form
  1. indicating three-dimensional quality or soliditystereoscope

Word Origin for stereo-

from Greek stereos solid
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 stereo-

word-forming element, before vowels stere-, from comb. form of Greek stereos "solid" (see stereotype).

Online Etymology Dictionary, © 2010 Douglas Harper

stereo- in Medicine

stereo-

pref.
  1. Solid; solid body:stereotropism.
  2. Three-dimensional:stereochemistry.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.