a combining form meaning “ancient,” used in the formation of compound words: archaeopteryx; archaeology.
Origin of archaeo-
< Greek, combining form of archaîos, equivalent to arch- (see archi-) + -aios adj. suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
indicating ancient or primitive time or conditionarchaeology; archaeopteryx
of, involving, or denoting the study of remains from archaeological sitesarchaeozoology
Word Origin for archaeo-
from Greek arkhaio-, from arkhaios, from arkhein to begin
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 archae-, word-forming element meaning "ancient, olden, primitive, primeval, from the beginning," from Latinized form of Greek arkhaio-, comb. form of arkhaios "ancient," from arkhe "beginning" (see archon).
Online Etymology Dictionary, © 2010 Douglas Harper