Dictionary
Nep•tu•ni•an
Pronunciation: (nep-tOO'nē-un, -tyOO'-), [key]—
adj.
1. pertaining to Neptune or the sea.
2. pertaining to the planet Neptune.
3. (often l.c.) Geol.formed by the action of water.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.