WordReference Random House Unabridged Dictionary of American English © 2025
met•a•so•ma•tism
(met′ə sō′mə tiz′əm),USA pronunciation n. [Geol.]
met•a•so•mat•ic
(met′ə sō mat′ik),USA pronunciation adj.
- Geologythe series of metamorphic processes whereby chemical changes occur in minerals or rocks as a result of the introduction of material, often in hot aqueous solutions, from external sources.
- Geologyreplacement (def. 4).
- 1885–90; meta- + somat- + -ism
'metasomatism' also found in these entries (note: many are not synonyms or translations):