from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A change within an intrusive igneous rock caused by the assimilation of portions of the surrounding rock.
  • n. A homomorphism that maps a mathematical system into itself.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The assimilation of surrounding rock by an intrusive igneous rock
  • n. A homomorphism that maps a system to itself

from The Century Dictionary and Cyclopedia

  • n. In petrography, changes brought about within the mass of an intrusive igneous rock by contact with the intruded rock.


endo- + -morphism (Wiktionary)



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