1. a combining form with the meanings “sugar,” “glucose and its derivatives,” used in the formation of compound words: glycolipid.
Also gluco-.Also especially before a vowel, glyc-.

Origin of glyco-

combining form representing Greek glykýs sweet Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for glyco-


before a vowel glyc-

combining form
  1. indicating sugarglycogen

Word Origin for glyco-

from Greek glukus sweet
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 glyco-

word-forming element meaning "sweet," from Latinized comb. form of Greek glykys "sweet" (see glucose). Used in reference to sugars generally. OED says a regular formation would be glycy-.

Online Etymology Dictionary, © 2010 Douglas Harper

glyco- in Medicine


  1. Sugar:glycoprotein.
  2. Glycogen:glycogenesis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.