Proper name: ACHELO'IS. 1. A surname of the Sirens, the daughters of Achelous and a muse. (Ov. Met. V. 552, xiv. 87; Apollod. i. 7. § 10.) 2. A general name for water-nymphs, as in Columella (x. 263), where the companions of the Pegasids are called Acheloides. (Wikisource | public domain)

Achĕlōĭs, ĭdis
* Patron. f. [id.], daughter of Achelous; hence (plur.), the Sirens, Ov. M. 5, 552.

s. TLL