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  1. a combining form meaning “blue, dark blue,” used in the formation of compound words: cyanotype.
Also especially before a vowel, cyan-1.

Origin of cyano-1

< Greek kýano(s) dark blue (adj.), dark-blue substance (noun)


  1. a combining form representing cyanide in the formation of compound words: cyanogen.
Also especially before a vowel, cyan-2.


  1. a combining form used in the names of chemical compounds in which the cyano group is present: cyanohydrin.
Also especially before a vowel, cyan-3.

Origin of cyano-3

combining form representing cyanogen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for cyano-


before a vowel cyan-

combining form
  1. blue or dark bluecyanotype
  2. indicating cyanogencyanohydrin
  3. indicating cyanide

Word Origin

from Greek kuanos (adj) dark blue, (n) dark blue enamel, lapis lazuli
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

cyano- in Medicine


  1. Blue:cyanosis.
  2. Cyanide:cyanocoalbumin.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.