Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of neptunian is as below...

Neptunian :: Neptunian (n.) Alt. of Neptunis.

Plutonism :: Plutonism (n.) The theory, early advanced in geology, that the successive rocks of the earth's crust were formed by igneous fusion; -- opposed to the Neptunian theory..

Neptunian :: Neptunian (a.) Of or pertaining to the ocean or sea.

Neptunian :: Neptunian (a.) Formed by water or aqueous solution; as, Neptunian rocks..

Neptunist :: Neptunist (n.) One who adopts the neptunian theory.

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