Nereid

Nereid (nĭr`ēəd), in astronomy, one of the eight known moons, or natural satellites, of Neptune.

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Nereid

In Greek mythology, any of the daughters of the sea god Nereus and of Doris, daughter of Oceanus. The Nereids, who numbered 50 or 100, were depicted as young girls who inhabited any water, salt or fresh, and were benign toward humanity. They were popular figures in Greek literature. The best known were Amphitrite, consort of Poseidon; Thetis, wife of Peleus (king of the Myrmidons) and mother of Achilles; and Galatea, a Sicilian loved by the Cyclops Polyphemus.

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Nereid [′nir·ē·əd]

(astronomy)

The outermost known satellite of Neptune, orbiting at a mean distance of 3,425,900 miles (5,513,400 kilometers) with a period of 360 days, 3.1 hours, and with a diameter of about 210 miles (340 kilometers).

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Nereid 

a satellite of the planet Neptune. Nereid has a diameter of 300 km, and its mean distance from the center of the planet is 5,570,000 km. It was discovered in 1949 by the American astronomer G. P. Kuiper. Nereid is the only planetary satellite in the solar system that has an extremely elongated orbit (eccentricity 0.75). It was named after the Nereids, sea nymphs of Greek mythology.