Geology. Relating to or characterized by metamorphism; formed by or causing metamorphism (metamorphism, n. 1). Also in extended use.

of or pertaining to thermo-metamorphism.

(a) Geology occurring or existing after metamorphism; (b) Biology occurring or existing after metamorphosis.

Geology. Of a mineral or rock: containing an appreciable or a greater than average quantity of potassium, often as compared with sodium. Also…

Geology. Of a mineral or rock: containing an appreciable or a greater-than-average quantity of sodium, often as compared with calcium or potassium…

Geology. = retrograde, adj. 3f.

Geology. Of a metamorphic change: caused by a decrease in temperature or pressure following the most intense phase of metamorphism. Contrasted with…

Of, pertaining to, or designating the earlier metamorphism undergone by the Lewisian rocks of the Pre-Cambrian in NW Scotland, the rocks formed by…