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| tiny organelle occurring in the cell cytoplasm, functioning as the site of protein manufacture |
| very young red blood cell, sampled as a measure of red blood cell formation |
| lymphocyte (ˈlɪmfəʊˌsaɪt) | |
| —n | |
| B-lymphocyte See also T-lymphocyte a type of white blood cell formed in lymphoid tissue | |
| lymphocytic | |
| —adj | |
lymphocyte lym·pho·cyte (lĭm'fə-sīt')
n.
Any of the nearly colorless cells formed in lymphoid tissue, as in the lymph nodes, spleen, thymus, and tonsils, constituting between 22 and 28 percent of all white blood cells in the blood of a normal adult human. They function in the development of immunity and include two specific types, B cells and T cells.
| lymphocyte (lĭm'fə-sīt') Pronunciation Key
Any of various white blood cells, including B cells and T cells, that function in the body's immune system by recognizing and deactivating specific foreign substances called antigens. B cells act by stimulating the production of antibodies. T cells contain receptors on their cell surfaces that are capable of recognizing and binding to specific antigens. Lymphocytes are found in the lymph nodes and spleen and circulate continuously in the blood and lymph. |