Geol. [f. prec. + -ISM.] The principles or doctrines held by the uniformitarian school of geologists; the theory of uniformity of action in the forces and processes of inorganic nature. (Opposed to CATASTROPHISM or CONVULSIONISM.)
1865. T. Marsden, Sacr. Steps Creation, 113. One is induced to ask, whether Uniformitarianism be mere Proselytism in the garb of Philosophy.
1894. Nature, 26 July, 290/1. The natural though exaggerated reaction into scientific uniformitarianism.
