Definition of embryo cell in US English:

embryo cell

noun

  • 1Biology the undivided cell of a fertilized ovum or zygote; a cell resulting from the first division of this, especially when giving rise to the embryo (rather than to yolk or other supporting structures).

  • 2Any of the cells forming a plant or animal embryo, or produced by artificial culture from such a cell.

Origin

Mid 19th century.