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Entry 3 senses · 2 variants Webster, 1913

Neptunian

· Nep·tu·ni·an · IPA /nɛpˈt(j)u.ni.ən/
01 prop. a. Of or pertaining to the ocean or sea.
  1. 1.
    Of or pertaining to the ocean or sea.
  2. 2.
    Formed by water or aqueous solution; as, Neptunian rocks.(Geol.)
Phrases & compounds
Neptunian races — the Malay and Polynesian races.
Neptunian theory — the theory of Werner, which referred the formation of all rocks and strata to the agency of water; -- opposed to the Plutonic theory.
02 prop. n. One who adopts the Neptunian theory.
  1. 1.
    One who adopts the Neptunian theory.(Geol.)