(chiefly of a drug or medicine) tending to stimulate or facilitate evacuation of the bowels
（主医药）催泻的, 通便的。
a medicine which has such an effect
轻泻药。
词源
late Middle English: via Old French laxatif, -ive or late Latin laxativus, from Latin laxare 'loosen' （from laxus 'loose'）.