a. Geol. [f. prec. + -IC.] Of the nature of, or containing, variolite; spherulitic.
1862. G. P. Scrope, Volcanoes, 365. The clinkstone is usually variolitic.
1878. Lawrence, trans. Cotta’s Rocks Classified, 139. Diabase … is sometimes … variolitic or amygdaloidal.
