The phrase "asymmetric cell" means that the cell is not the same on both sides. It has a different shape, structure, or function on one side compared to the other. Full definition
In particular, we are investigating whether, and how, Numb and endocytosis - based mechanisms are involved in the regulation of asymmetric cell division of human breast stem cells. (ifom-ieo-campus.it)
«Live cell imaging of asymmetric cell division in fertilized plant cells: Insight into why leaves grow up and roots grow down in flowering plants.» (sciencedaily.com)
She also investigates how asymmetric cell division impacts on the cellular potential to give rise to multiple lineages in vivo. (eurosystemproject.eu)