pyroclastic (piroklastik)

[ It is a erted that there is an absence of ma es of pyro clastic materials (tuffs and dust) such as we should expect to find around great volcanic centres. Quart. Jour. Geol. Soc., XLV. 204. Pyro der inæt (pi-rod-e-ri'nē), n. pl. [NL., Py roderus + -inæ.] A subfamily named from the genus Pyroderus. See Gym no der inæ. Pyroderus (pi-rod'e-rus), n. [NL. (G. R. Gray, 1840),