versus

preposition
ver*sus \ ˈvər-səs \ -səz \
15th century{ds||1||}
  • against
  • in contrast to or as the alternative of

graft-versus-host disease

noun
graft-ver*sus-host disease \ ˈgraft-ˌvər-səs-ˈhōst- \
1965
  • a potentially fatal bodily condition that results when T cells from a tissue or organ transplant and especially a bone marrow transplant react immunologically against the recipient's antigens attacking cells and tissues
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