graft-versus-host disease(redirected from Graft v. host)
Also found in: Medical.
graft-ver·sus-host disease(grăft′vûr′səs-hōst′, -səz-)
A condition in which cells from the transplanted tissue of a donor initiate an immunologic attack on the cells and tissue of the recipient.
a reaction in which the cells of transplanted tissue immunologically attack the cells of the host.