Word Study
    neptunian
CIDE DICTIONARY
neptunian, prop. a. [L. Neptunius belonging to Neptune: cf. F. neptunien.]. 
                                            -                                     Of or pertaining to the ocean or sea. [1913 Webster]
-                                     Formed by water or aqueous solution; as, Neptunian rocks. [1913 Webster]
neptunian, prop. n. [Cf. F. neptinien, neptuniste.]. 
                                            
                                         One who adopts the Neptunian theory.                                                                                 [1913 Webster]                                                                                                                    
                                                                                    
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