antigen
noun /ˈæntɪdʒən/
/ˈæntɪdʒən/
(medical- a substance that enters the body and starts a process that can cause disease. The body then usually produces antibodies to fight the antigens.
Topics Biologyc2抗原(能激发人体产生抗体) 词源early 20th cent.: via German from French antigène (from anti- + -gen).