Where does “αριθμομηχανή” come from?

αριθμομηχανή (Greek) comes from Greek μηχανή, from Ancient Greek μηχᾰνή — a machine.

αριθμομηχανή (Greek): calculator more formal term

Definitions

αριθμομηχανή traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Greek	μηχανή	machine, engine; locomotive, the power unit of a...
2	Ancient Greek	μηχᾰνή	a machine

Step	Language	Word	Meaning
1	Greek	αριθμός	numeral, number
2	Ancient Greek	ἀρῐθμός	number