A poisonous substance, especially a protein, that is produced by living cells or organisms and is capable of causing disease when introduced into the body tissues but is often also capable of inducing neutralizing antibodies or antitoxins.

• 毒素一种有毒物质，尤指蛋白质，由活着的细胞或生物体产生，当进入身体组织后能够导致疾病，但通常也可导致生成中性抗体或抗毒素