lypressin
nounMedical Definition of lypressin
: a vasopressin in which the eighth amino acid residue in its polypeptide chain is a lysine residue (as in pigs) rather than an arginine residue (as in most mammals including humans) and which is used especially as a nasal spray in the control of diabetes mellitus
— called also lysine vasopressin
— compare arginine vasopressin