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laxative

lax·a·tive [ láksətiv ] (plural lax·a·tives)


noun 
Definition:
 
drug used to promote bowel movements: a drug or other substance that promotes bowel movements, either by irritating the lower colon or by bulking the stool

[14th century. < Old French laxatif< medieval Latin laxativus "loosening" < Latin laxare "loosen" < laxus "loose"]

lax·a·tive adjective
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