ˈ ̷ ̷ ̷ ̷ ̷ ̷ ˌ ̷ ̷ - noun
: a mitogenic growth factor that is found especially in platelets, consists of two polypeptide chains linked by bonds containing two sulfur atoms each, stimulates cell proliferation (as in connective tissue, smooth muscle, and neuroglia), and plays a role in wound healing