Main Entry: cross–re·ac·tion Pronunciation: "kros-rE-'ak-sh&n Function: noun : reaction of one antigen with antibodies developedagainst another antigen —cross–re·act/-'akt/intransitive verb
cross reactionn. A specific reaction between an antiserum and an antigen complex other than the complex that caused the production of the specific antibodies of the antiserum.