vasopressinecommon nounSyllable DecompositionvasopressineEtymologyexpandsee vaso-Definition1. Peptide hormone synthesized by the hypothalamus and released by the posterior pituitary. It has primarily an antidiuretic action during body dehydration.biologieexpandSynonymsADHantidiuretichormoneAVParginine-vasopressinehormoneantidiurétiquePluralvasopressinesHyperonymshormone peptidiquepolypeptide