Plutonism

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Plutonism \Plu"to*nism\, n. [Cf. F. plutonisme.]
     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.
     [1913 Webster]