柯林斯詞典ammonia /??m??n??/ 1. N-UNCOUNT Ammonia is a colourless liquid or gas with a strong, sharp smell. It is used in making household cleaning substances. 氨; 氨水 返回 ammonia劍橋詞典a gas with a strong , unpleasant smell used in making explosives , fertilizers (= substances that help plants grow ), and some cleaning products 氨；氨水 返回 ammonia