Hyades, in Greek mythology, daughters of the Titan Atlas and the Oceanid Aethra, the five (or more) sisters of the Pleiades who nursed the infant wine god, Dionysus, and as a reward were made the five stars in the head of the constellation Taurus, the bull. According to another version, they so bitterly lamented the death of their brother Hyas that Zeus, out of compassion, changed them into stars. Their name means the Rainers, since they rose in October and set in April.