The change in morphology and behavior of a mature or immature T cell resulting from exposure to a mitogen, cytokine, chemokine, cellular ligand, or an antigen for which it is specific. [ https://www.worldcat.org/search?q=bn%3A0781735149 GOC:mgi_curators ]

Synonyms: T lymphocyte activation T-lymphocyte activation T-cell activation

This is just here as a test because I lose it