What is the Definition of a Stem Cell?

Stem cells are kind of a non-specific cell type that have the ability to be regenerated after periods of inactivity, and can be in a way, taught to become a specific cell; such as a tissue or organ cell. They also have the ability to renew themselves through the dividing process and after the division, each new cell can be a stem cell or become a specialized cell. You can find more information here: