n :  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 esp. as a nasal spray in the control of diabetes mellitus - called also lysine vasopressin  - compare ARGININE VASOPRESSIN  .
 
 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2025.