抗こう原げん抗こう体たい反はん応のうこうげんこうたいはんのうMeanings1nounantigen-antibody reactionTechnical term in immunology; often abbreviated as AAR.抗こう原げん抗こう体たい反はん応のうは免めん疫えき学がくの基き本ほん的てきな概がい念ねんです。The antigen-antibody reaction is a fundamental concept in immunology.