Definition of Nereis in US English:

Nereis

noun

Zoology
  • A genus of marine annelids (the type genus of the family Nereidae or Nereididae, the ragworms); (also nereis) a worm of (or formerly assigned to) this genus.

Origin

Mid 18th century; earliest use found in John Hill (bap. 1714, d. 1775), physician and actor. From scientific Latin Nereis (Linnaeus Systema Naturae (ed. 10, 1758) I. 654) from classical Latin Nērēis, Nēreis.