ACIS, in Mythology, the son of Faunus and the nymph Simæthis, was a beautiful shepherd of Sicily, who being beloved by Galatea, Polyphemus the giant was so enraged, that he dashed out his brains against a rock; after which Galatea turned him into a river, which was called by his name.

The Sicilian authors say, that Acis was a king of this

Acknowledgment this part of the island, who was slain by Polyphemus, one of the giants of Ætna, in a fit of jealousy.