Plutonic rocks Meaning, Definition & Usage

  1. noun large mass of intrusive igneous rock believed to have solidified deep within the earth
    plutonic rock; batholite; pluton; batholith.

WordNet

Definitions
  1. (Geol.), granite, porphyry, and some other igneous rocks, supposed to have consolidated from a melted state at a great depth from the surface. Cf. Intrusive rocks, under Intrusive.

Webster 1913