fragmentation bomb
noun [ C ] uk/fræɡ.menˈteɪ.ʃən ˌbɒm/ us/fræɡ.menˈteɪ.ʃən ˌbɑːm/ (informal frag bomb, /ˈfræɡ ˌbɒm/ /ˈfræɡ ˌbɑːm/)
破裂弹;杀伤弹（一种炸弹，其表层较厚，爆破时表层向各个方向破裂）
a bomb that has a thick outer covering that breaks into a lot of small pieces that are thrown in every direction when it explodes