Lymphocyte (noun)

1. A type of white blood cell that is important for the immune system, particularly in the production of antibodies and the recognition and destruction of foreign antigens.
2. A type of leukocyte which is formed in the lymphatic system or bone marrow and is present in the blood and lymph.

Origin:

From french lymphocyte, from lympho- + -cyte.

Examples:

1. Lymphocytes help the body to fight off infections and diseases.
2. The patient's lymphocyte count was low, indicating a weakened immune system.
3. Lymphocytes are a type of white blood cell that play a key role in the immune system.
4. Lymphocytes are produced in the bone marrow and are found in the blood and lymph.
5. There are two main types of lymphocytes, B cells and T cells, each with specific functions in the immune response.