dilates

1.The pupil of the eye dilates and contracts in response to light.

作为对光线作出的反应，眼睛的瞳孔会缩小。

2.Atrial natriuretic peptide in plasma dilates veins and arteries,acts as a diuretic and inhibits neurohumoral effects.

血浆心钠肽具有扩血管、利尿、拮抗神经内分泌激素的多种作用。

3.Abortifacient A drug, herb or other chemical agent that dilates the cervix and/or causes the uterus to contract, resulting in the ending of a pregnancy before the fetus can survive on its own.

堕药用于扩张宫颈和/导致子宫收缩，导致在婴儿能够自己生存以前结的一种药物，草药其它化学物质。