The definition of a stem cell is a simple cell that can duplicate itself over and over, providing new cells that can turn into cells with a specific purpose.
An example of a stem cell is a cell that can reproduce itself many times into cells which become blood cells.
Biol. any of a number of rudimentary cells that replicate repeatedly, providing a continuous source of new cells that differentiate into specialized cells
An unspecialized cell that can give rise to one or more different types of specialized cells, such as blood cells and nerve cells. Stem cells are present in embryos and in various tissues of adult organisms and are widely used in scientific research.
An unspecialized cell found in fetuses, embryos, and some adult body tissues that has the potential to develop into specialized cells or divide into other stem cells. Stem cells from fetuses or embryos can develop into any type of differentiated cells, while those found in mature tissues develop only into specific cells. Stem cells can potentially be used to replace tissue damaged or destroyed by disease or injury, but the use of embryonic stem cells for this purpose is controversial. Also called progenitor cell