Where does “atlanto-” come from?

atlanto- (English) comes from Latin Ātlās, from Ancient Greek Ἄτλας, from Ancient Greek ἀ-, from Proto-Hellenic hə-, from Proto-Indo-European sm̥-, from Proto-Indo-European sem- — together, one.

atlanto- (English): atlas

Definitions

atlas

Ancestry of “atlanto-”, step by step

Step	Language	Word	Meaning
1	Latin	Ātlās	the Titan Atlas
2	Ancient Greek	Ἄτλας	the ‘Bearer’ of Heaven; Atlas; the 'Bearer' of...
3	Ancient Greek	ἀ-	The alpha privativum, used to make words that...
4	Proto-Hellenic	hə-	same; together
5	Proto-Indo-European	sm̥-	one; with, together
6	Proto-Indo-European	sem-	together, one

Words derived from “atlanto-”

atlantoaxial
atlantooccipital
atlantodental
atlantoepistrophic
atlantomastoid
occipitoatlantoaxial

Every word from Proto-Indo-European sem- →Every word from Ancient Greek ἀ- →Every word from Proto-Indo-European sm̥- →