CD8 cell cdcell uncommon noun 1. T cell with CD8 receptor that recognizes antigens on the surface of a virus-infected cell and binds to the infected cell and kill it Synonymskiller T cellkiller cellcytotoxic T cellCD8 T cellCD8 cell Related words Broader terms T cell WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.