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
< Greekstereós
British Dictionary definitions for stereo-
stereo-
combining form
1.
indicating three-dimensional quality or solidity: stereoscope
Word Origin
from Greek stereos solid
Word Origin and History for stereo-
word-forming element, before vowels stere-, from comb. form of Greek stereos "solid" (see stereotype).