English word neo- comes from Ancient Greek νεο-

Detailed word origin of neo-

Dictionary entry	Language	Definition
νεο-	Ancient Greek (grc)
neo-	English (eng)	(organic chemistry) Being a newly-discovered or -synthesized variant of an existing compound. (organic chemistry) Having a structure, similar to that of neopentane, in which each hydrogen atom of a methyl group has been replaced by an alkyl group. Contemporary. New.