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Webster 1913 Edition


Neptunian

Nep-tu′ni-an

,
p
rop.
Adj.
[L.
Neptunius
belonging to Neptune: cf. F.
neptunien
.]
1.
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 1828 Edition


Neptunian

NEPTUNIAN

,
Adj.
[the fabled deity of the ocean.]
1.
Pertaining to the ocean or sea.
2.
Formed by water or aqueous solution; as Neptunian rocks.

NEPTUNIAN

,
Noun.
One who adopts the theory that the whole earth was once covered with water, or rather that the substances of the globe were formed from aqueous solution; opposed to the Plutonic theory.