cell line cell immortal cell line cell Yongqun He, Matthew Brush, Allen Xiang, Asiyah Yu Lin, Sirarat Sarntivijai, James Malone, Jie Zheng, Tomasz Adamusiak continuous cell line cell A cell line cell that is expected to be capable of an unlimited number of divisions, and is thus able to support indefinite propagation in vitro as part of an immortal cell line. permanent cell line cell