Where does “Tridacna” come from?

Tridacna (Translingual) comes from Ancient Greek τρίδακνον, from Ancient Greek τρι-, from Ancient Greek τρεῖς, from Proto-Hellenic tréyes, from Proto-Indo-European *tréyes.

Tridacna (Translingual): genus

Definitions

genus

Ancestry of “Tridacna”, step by step

Tridacna traces back through two separate lines of ancestry.

via Ancient Greek τρίδακνον

Step	Language	Word	Meaning
1	Ancient Greek	τρίδακνον	large oyster
2	Ancient Greek	τρι-	tri-
3	Ancient Greek	τρεῖς	three
4	Proto-Hellenic	tréyes	three
5	Proto-Indo-European	*tréyes	—

via Ancient Greek τρίδακνος

Step	Language	Word	Meaning
1	Ancient Greek	τρίδακνος	—
2	Ancient Greek	τρῐ-	three; {{l\|en\|tri-}}

Every word from Proto-Indo-European *tréyes →Every word from Proto-Hellenic tréyes →Every word from Ancient Greek τρεῖς →