noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An antidiuretic hormone secreted by the pituitary gland. countable, uncountable
2. 2
   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 wordnet

Synonyms

All synonyms

adhantidiuretic hormonepitressin

Etymology

From vasopressor + -in, circa 1927; see details at vasopressor § Etymology.

Related phrases

pituitary gland

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.