Mitosis/maɪˈtəʊsɪs/ Definition 1 of 2Pro Tip 1/3Biological Events Mitosis is a biological event allowing growth, not an everyday occurrence. The lizard's tail grew back through mitosis after it was lost. Pro Tip 2/3Academic Vocabulary The term 'mitosis' is typically used in scientific or educational contexts. She explained the phases of mitosis in her biology presentation. Pro Tip 3/3Not Synonymous While mitosis means cell division, not all cell division is mitosis. Bacterial cells divide by binary fission, different from mitosis.