裂变碎片 lièbiànsuìpiàn fission fragment Origin Definitions Defs Strokes Stroke Words Sentences Sents 裂变 裂變 lièbiàn nuclear fission (physics) The process where a heavy nucleus splits into two or more smaller nuclei, releasing energy and neutrons.碎片 suìpiàn noun fragment fragment; splinter; chip; shred; tatter