pyroclastic

[ pahy-ruh-klas-tik ]
/ ˌpaɪ rəˈklæs tɪk /

adjective Geology.

composed chiefly of fragments of volcanic origin, as agglomerate, tuff, and certain other rocks; volcaniclastic.

Origin of pyroclastic

First recorded in 1885–90; pyro- + clastic

Words nearby pyroclastic

pyroborate, pyrocatechol, pyrocellulose, pyrochemical, pyrochlore, pyroclastic, pyroconductivity, pyrocrystalline, pyroelectric, pyroelectricity, pyrogallate

British Dictionary definitions for pyroclastic

pyroclastic
/ (ˌpaɪrəʊˈklæstɪk) /

adjective

(of rocks) formed from the solid fragments ejected during a volcanic eruption

Scientific definitions for pyroclastic

pyroclastic
[ pī′rō-klăs′tĭk ]

Composed chiefly of rock fragments of explosive origin, especially those associated with explosive volcanic eruptions. Volcanic ash, obsidian, and pumice are examples of pyroclastic materials.