a light, dry biscuit or piece of rebaked bread, especially one prepared for use as baby food (尤指用作婴儿食品的)脆饼干;面包干 ■[mass noun]rebaked bread used, for example, as extra filling for sausages, and formerly as rations at sea (如用作香肠馅的,旧时用作航海配给品的)面包干
语源
late 16th cent.: from Spanish or Portuguese rosca 'twist, coil, roll of bread', of unknown ultimate origin