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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 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for stereo-


combining form
indicating three-dimensional quality or solidity: stereoscope
Word Origin
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
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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
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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.
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