Definitions for oxytocinˌɒk sɪˈtoʊ sən
Random House Webster's College Dictionary
ox•y•to•cinˌɒk sɪˈtoʊ sən(n.)
a pituitary hormone that stimulates contraction of the smooth muscles of the uterus to induce labor.
Category: Biochemistry, Pharmacology
Origin of oxytocin:
hormone secreted by the posterior pituitary gland (trade name Pitocin); stimulates contractions of the uterus and ejection of milk
A hormone that stimulates contractions during labour/labor, and then the production of milk.
Origin: From oxytocic, from ὀξύς + τόκος, from τίκτω.
U.S. National Library of Medicine
A nonapeptide hormone released from the neurohypophysis (PITUITARY GLAND, POSTERIOR). It differs from VASOPRESSIN by two amino acids at residues 3 and 8. Oxytocin acts on SMOOTH MUSCLE CELLS, such as causing UTERINE CONTRACTIONS and MILK EJECTION.