资料来源 : pyDict

深成现象; 火成论; 火成说

资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.