Where does “deltidion” come from?

deltidion (Latin) comes from Ancient Greek δέλτα, from Phoenician 𐤃, from Egyptian 𓉿.

Ancestry of “deltidion”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	δέλτα	delta, the name for the fourth letter Δ, δ of the...
2	Phoenician	𐤃	dalet; daleth
3	Egyptian	𓉿	—

deltidion — Etymology, Origin & Word History | Etymology Explorer