NEPTUNIAN
Nep*tu"ni*an, a. Etym: [L. Neptunius belonging to Neptune: cf. F.
neptunien.]
1. Of or pertaining to the ocean or sea.
2. (Geol.)
Definition: Formed by water or aqueous solution; as, Neptunian rocks.
Neptunian races (Ethnol.), the Malay and Polynesian races.
– Neptunian theory (Geol.), the theory of Werner, which referred
the formation of all rocks and strata to the agency of water; --
opposed to the Plutonic theory.
Nep*tu"ni*an, Nep"tu*nist, n. Etym: [Cf. F. neptinien, neptuniste.]
(Geol.)
Definition: One who adopts the neptunian theory.
Source: Webster’s Unabridged Dictionary 1913 Edition