The story
peptide found in an EXocrine secretion of Heloderma lizards which has ENDocrine activity" (J Biol Chem (1990) 265: 20259) + -in
Etymology from Wiktionary, CC BY-SA 4.0.
exendin
Today it means: Any of a group of peptide agonists found in Gila monster venom. Full definition →