v. Min. rare. [f. F. fendill-er (dim. of feudre:—L. findĕre to split) + -ATE3.] trans. To crack with many small fissures. Hence Fendillated ppl. a.; Fendillation, fendillated condition.

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1833.  Th. Ross, trans. Humboldt’s Trav., III. xxix. 168. This rock is much fendillated. Ibid., III. xxxii. 401. The greyish blue amygdaloid contains fendillated crystals of pyroxene and mesotype. Ibid., 402. These, by their fendillation and open crevices, seem to establish that permanent communication between the surface of the soil and the interior of the globe, which is the indispensible condition of the existence of a volcano.

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