Meaning of nauplius

nau•pli•us

Pronunciation: (nô'plē-us), [key]
— pl. -pli•i
  1. (in many crustaceans) a larval form with three pairs of appendages and a single median eye, occurring usually as the first stage of development after leaving the egg.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.