pyroclastic adjective & noun.
[pʌɪrǝ(ʊ)'klastɪk] L19.[from PYRO- + CLASTIC.]Geology.
A. adjective. Pertaining to or designating fragmental rocks of volcanic origin.
L19.b. noun. A pyroclastic rock or rock fragment.
E20. ■ 'pyroclast noun a pyroclastic rock fragment
E20. [TahlilGaran] English Dictionary ▲