- retaining or preserving moisture保湿的; 湿润的。
- a substance, especially a skin lotion or a food additive, used to reduce the loss of moisture（尤指护肤液或食品添加剂）保湿剂, 保湿液。
词源
early 19th cent. (denoting a moistening agent)： from Latin humectant- 'moistening', from the verb humectare, from humectus 'moist, wet', from humere 'be moist'.