Definitions for "Embryonic stem cells"
a line of cells derived from disaggregated pre-implantation embryos that possess totipotent nuclei that have not undergone differentiation into specialized tissue cells and are capable of forming an entire individual.
(ES cells). Stem cells have the dual capacity to self-replicate and differentiate into several specialized derivatives. ES cells are pluripotent cells that are derived from pre-implantation stage (usually blastocyst) mammalian embryos. Mouse ES cells can be propagated and manipulated in vitro, yet still retain their pluripotency.
See: stem cell