Etymology
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vasopressin (n.)

1928, from vasopressor "causing the constriction of (blood) vessels) (from vaso-, combining form of Latin vas "container, vessel;" see vas) + -in (2).

updated on October 09, 2017

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Definitions of vasopressin from WordNet

vasopressin (n.)
hormone secreted by the posterior pituitary gland (trade name Pitressin) and also by nerve endings in the hypothalamus; affects blood pressure by stimulating capillary muscles and reduces urine flow by affecting reabsorption of water by kidney tubules;
Synonyms: antidiuretic hormone / adh / Pitressin
From wordnet.princeton.edu, not affiliated with etymonline.