Etymology
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vasodilation (n.)

1896, from vasopressor, from vaso-, combining form of Latin vas "container, vessel" (see vas) + dilation. Related: Vasodilator (1881).

updated on November 14, 2017

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Definitions of vasodilation from WordNet

vasodilation (n.)
dilation of blood vessels (especially the arteries);
From wordnet.princeton.edu, not affiliated with etymonline.