a small bomb thrown by hand or launched mechanically 手榴弹;枪榴弹 ■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)
语源
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