Wiktionary
disintegrin
n. (context biochemistry English) Any of a family of polypeptides, isolated from venom, that interact with integrin proteins and inhibit the clumping of platelets
Wikipedia
Disintegrin
Disintegrins are a family of small proteins (45–84 amino acids in length) from viper venoms that function as potent inhibitors of both platelet aggregation and integrin-dependent cell adhesion.