lypressin
noun
ly·pres·sin
| \ ˌlī-ˈpres-ᵊn
\
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Medical 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