paleo- Look up paleo- at
before vowels pale- word-forming element used in scientific combinations (mostly since c. 1870) meaning "ancient, early, prehistoric, primitive," from Latinized form of Greek palaios "old, ancient," from palai "long ago, far back," related to palin "again, backwards," tele- "far off, at a distance," from PIE root *kwel- (2) "far" in space and time" (see tele-).