Nep*tu"ni*an (?), a. [L. Neptunius belonging to Neptune: cf. F. neptunien.]


Of or pertaining to the ocean or sea.

2. Geol.

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.

© Webster 1913.

Nep*tu"ni*an (?), Nep"tu*nist (?), n. [Cf. F. neptinien, neptuniste.] Geol.

One who adopts the neptunian theory.

© Webster 1913.

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