immune system
Definition of immune system
: the bodily system that protects the body from foreign substances, cells, and tissues by producing the immune response and that includes especially the thymus, spleen, lymph nodes, special deposits of lymphoid tissue (as in the gastrointestinal tract and bone marrow), macrophages, lymphocytes including the B cells and T cells, and antibodies
Indulge Your Inner Word Nerd
First Known Use of immune system
circa 1919
IMMUNE SYSTEM Defined for English Language Learners
immune system
Definition of immune system for English Language Learners
-
: the system that protects your body from diseases and infections
IMMUNE SYSTEM Defined for Kids
immune system
Definition of immune system for Students
: the system of the body that fights infection and disease and that includes especially the white blood cells and antibodies and the organs that produce them
Medical Dictionary
immune system
Medical Definition of immune system
: the bodily system that protects the body from foreign substances, cells, and tissues by producing the immune response and that includes especially the thymus, spleen, lymph nodes, special deposits of lymphoid tissue (as in the gastrointestinal tract and bone marrow), lymphocytes including the B cells and T cells, and antibodies
Learn More about immune system
-
Spanish Central: Translation of immune system Nglish: Translation of immune system for Spanish speakers Britannica English: Translation of immune system for Arabic speakers Britannica.com: Encyclopedia article about immune system
Seen and Heard
What made you want to look up immune system? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!