Also especially before a vowel, kerat-. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for kerato-


before a vowel kerat-

combining form
  1. indicating horn or a horny substancekeratin; keratogenous
  2. indicating the corneakeratoplasty

Word Origin for kerato-

from Greek kerat-, keras horn
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 kerato-

before vowels, kerat-, word-forming element meaning "horn, horny," from Greek keras (genitive keratos) "horn," from PIE *ker- (1) "horn, head" (see horn (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper

kerato- in Medicine


  1. Horn; horny:keratosis.
  2. Cornea:keratectomy.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.