WordReference Random House Unabridged Dictionary of American English © 2026
mem′ory cell′, [Immunol.]
- Immunologyany small, long-lived lymphocyte that has previously encountered a given antigen and that on reexposure to the same antigen rapidly initiates the immune response (memory T cell) or proliferates and produces large amounts of specific antibody (memory B cell:) the agent of lasting immunity.