substance found in the liver, lungs and other tissues, 1918, from Greek hēpar "liver" (see hepatitis) + -in (2).
Entries linking to heparin
hepatitis n.
1727, from Greek hēpatos, genitive of hepar "liver," from PIE root *yekwr- (source also of Sanskrit yakrt, Avestan yakar, Persian jigar, Latin jecur, Old Lithuanian jeknos "liver") + -itis "inflammation."
-in 2
word-forming element in chemistry, usually indicating a neutral substance, antibiotic, vitamin, or hormone; a modification and specialized use of -ine (2).