Where does “diastem” come from?

diastem (English) comes from Latin diastema, from Ancient Greek διάστημα, from Ancient Greek δῐᾰ-, from Ancient Greek διά, from Proto-Indo-European dwís, from Proto-Indo-European dwóh₁ — two.

diastem (English): Intervening space; interval; An interval; A minor...

Definitions

Intervening space; interval; An interval; A minor...

Ancestry of “diastem”, step by step

Step	Language	Word	Meaning
1	Latin	diastema	—
2	Ancient Greek	διάστημα	interval, space between
3	Ancient Greek	δῐᾰ-	apart; through, across; through; in different...
4	Ancient Greek	διά	throughout
5	Proto-Indo-European	dwís	twice, doubly; in two
6	Proto-Indo-European	dwóh₁	two

Every word from Proto-Indo-European dwóh₁ →Every word from Ancient Greek δῐᾰ- →Every word from Proto-Indo-European dwís →