pneumatolysis noun.
[nju:mǝ'tɒlɪsɪs] L19.[from PNEUMATO- + -LYSIS.]Geology. The chemical alteration of rock and formation of minerals by the action of hot magmatic gases and vapours.
■ pneumatol'ytic adjective involving or formed by pneumatolysis
L19. ■ pneumato'lytically adverb M20. [TahlilGaran] English Dictionary ▲