名詞 antigen:

1. any substance (as a toxin or enzyme) that stimulates an immune response in the body (especially the production of antibodies)

1. The attraction between an antigen and an antibody.
   化合力抗原和抗體之間的相互吸引
2. Relating to the correspondence between an antigen and the antibody produced in response to it.
   同源的與抗原和對其反應(yīng)產(chǎn)生的抗體同的對應(yīng)現(xiàn)象有關(guān)的
3. An antibody produced by or derived from the same species as the antigen with which it reacts.
   同種抗體; 同族抗體由與抗原相同的種類產(chǎn)生的或衍生的抗體，由它對該抗原作出反應(yīng)
4. A protein substance produced in the blood or tissues in response to a specific antigen, such as a bacterium or a toxin. Antibodies destroy or weaken bacteria and neutralize organic poisons, thus forming the basis of immunity.
   抗體，免疫體血液或組織針對某種抗原如細菌或毒素而產(chǎn)生的蛋白質(zhì)物質(zhì)。抗體消滅細菌或削弱其作用，中和有機毒素，因而形成免疫力

an.ti.gen

n.（名詞）
A substance that when introduced into the body stimulates the production of an antibody. Antigens include toxins, bacteria, foreign blood cells, and the cells of transplanted organs.
抗原：當被引入人體內(nèi)可以促進抗體產(chǎn)生的物質(zhì)。抗原包括毒素，細菌，異體血球和移植器官的細胞

【引伸】
an.tigen.ic
an.tigen.ically
adv.（副詞）
an.tigenic.ity