B lymphocyte, also known as B cell, is an important type of white blood cell that plays a crucial role in the immune system. These cells are responsible for producing antibodies that target and neutralize harmful pathogens or foreign substances. There are several synonyms for B lymphocytes, including B cells, antibody-producing cells, immunoglobulin-secreting cells, and humoral immune cells. These terms all refer to the same type of white blood cell that produces antibodies to fight infections. B lymphocytes play a vital role in the body's defense against diseases, and understanding their function and synonyms can help improve our understanding of the immune system and how it works.