grenade
/grəˈneɪd/noun
1- a small bomb thrown by hand or launched mechanically手榴弹; 枪榴弹。
1.1
- a glass receptacle containing chemicals which are released when the receptacle is thrown and broken, used for testing drains and extinguishing fires.（内装化学剂的）玻璃投掷瓶（用于检验排水道和灭火）。
词源
mid 16th cent. （in the sense 'pomegranate'）： from French， alteration of Old French （pome） grenate （see POMEGRANATE）， on the pattern of Spanish granada. The bomb was so named because of its shape， supposedly resembling a pomegranate.