noun, often attrib \ˌsē-(ˌ)dē-ˈāt\

Definition of CD8

: a glycoprotein found especially on the surface of cytotoxic T cells that usually functions to facilitate recognition by cytotoxic T cell receptors of antigens complexed with molecules of a class that are found on the surface of most nucleated cells and are the product of genes of the major histocompatibility complex

Seen & Heard

What made you want to look up CD8? Please tell us where you read or heard it (including the quote, if possible).