ejecta
/ɪˈdʒektə/plural noun
often treated as sing.
- chiefly Geology & Astronomy material that is forced or thrown out, especially as a result of volcanic eruption, meteoritic impact, or stellar explosion【主地质, 主天文】（尤指火山喷发、陨星撞击或恒星爆炸时的）喷出物, 排出物。
词源
late 19th cent.: from Latin, 'things thrown out', neuter plural of ejectus 'thrown out', from eicere （see EJECT）.