Any of various substances released by T cells that have been activated by antigens. They function in the immune response through a variety of actions, including stimulating the production of nonsensitized lymphocytes and activating macrophages.

• 淋巴因子任一种由T细胞释放出的被抗原激活的各种物质，他们通过多种行为对免疫反应起作用，包括刺激不灵敏淋巴细胞的生成和激活巨噬细胞