Are leukocyte and lymphocyte mean the same thing?

Leukocyte and lymphocyte do not mean the same thing.

Leukocyte, also known as a white blood cell (WBC), is a general term for a type of blood cell that helps to fight infection and disease. There are several different types of leukocytes, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils. Each type of leukocyte has a specific role in the immune system.

Lymphocyte is a specific type of leukocyte that is responsible for the body's immune response. Lymphocytes are produced in the bone marrow and mature in the thymus gland. There are two main types of lymphocytes: T cells and B cells. T cells help to destroy infected cells and cancerous cells, while B cells produce antibodies that help to neutralize harmful substances.

So, while leukocyte is a general term for a type of blood cell that helps to fight infection and disease, lymphocyte is a specific type of leukocyte that is responsible for the body's immune response.