Ma'anar ƙamus na "immune gamma globulin" yana nufin ƙwayar furotin da ke cikin tsarin garkuwar jiki daga cututtuka. Hakanan ana kiranta da immunoglobulin kuma nau'in rigakafi ne wanda fararen jini ke samarwa wanda ake kira ƙwayoyin plasma. Immune gamma globulin na iya taimakawa wajen kare jiki daga wasu cututtuka da cututtuka ta hanyar ɗaurewa da kawar da abubuwa masu cutarwa kamar ƙwayoyin cuta, ƙwayoyin cuta, da gubobi. Ana kuma amfani da ita ta hanyar warkewa a matsayin magani ga wasu cututtuka na tsarin rigakafi, irin su rashin ƙarfi na farko da wasu cututtuka na autoimmune.