Greek: Ἀχελωίς, English translation: “she who washes away pain” - a name for several figures in Greek mythology:
1. a minor Greek moon goddess. She was frequently the recipient of sacrifices ordered by the Dodonian Oracle, in order for her subjects to be cured of their ailments.
2. surname of the Sirens, the daughters of Achelous and a muse.
3. a general name for water-nymphs, as in Columella, where the companions of the Pegasids are called Acheloides.