a combining form meaning “red,” used in the formation of compound words: erythrocyte.
Also especially before a vowel, erythr-.
Origin of erythro-
From the Greek word erythrós red, reddish
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin for erythro-
from Greek eruthros red
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
before vowels, erythr-, word-forming element meaning "red," from Greek erythro-, comb. form of erythros "red" (in Homer, also the color of copper and gold); see red (1).
Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.