1 a unit for measuring how much energy food will produce 卡路里，卡（食物的热量单位）: A fried egg contains about 100 calories. 一个煎鸡蛋含有大约100卡热量。a low-calorie drink/yoghurt/diet 低卡路里饮料╱酸奶╱饮食

2 (technical术语) a unit for measuring a quantity of heat; the amount of heat needed to increase the temperature of a gram of water by one degree Celsius 大卡，千卡（热量单位，一克水升高一摄氏度所需要的热量）