ˌ ̷ ̷ ̷ ̷ˈtōs ə n noun
( -s )
Etymology: International Scientific Vocabulary oxytoc ic + -in
: a polypeptide hormone C 43 H 66 N 12 O 12 S 2 that is secreted together with vasopressin by the posterior lobe of the pituitary, that is also obtained synthetically, and that stimulates especially the contraction of uterine muscle and the ejection of milk — called also alpha-hypophamine