1. One who adopts the neptunian theory.

2. Pertaining to the sea; formed by water or aqueous solution. The Neptunian theory, the theory which refers the formation of all rocks and strata to the agency of water.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• neptunium,
• beptunian,
• meptunian,
• jeptunian,
• heptunian,
• nwptunian,
• nsptunian,
• ndptunian,
• nrptunian,
• n4ptunian,
• n3ptunian,
• neotunian,
• neltunian,
• ne-tunian,
• ne0tunian,
• Neptunean,
• Neptunine,
• Neptunianne,
• Neptonian,
• Neptonan