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Definition of: Plutonian
(pl
·tō′nē·ən) adjective
1. Pertaining to Pluto and the lower world; hence, subterranean.
2. Geol. Of or pertaining to the Plutonic theory of rock formation. Also Plu·ton′ic (-ton′ik). [<L Plutonius <Gk. Ploutonios like Pluto]
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