embryo /ˈɛmbrɪəʊ/ noun plural noun: embryos 1. 1. an unborn or unhatched offspring in the process of development, in particular a human offspring during the period from approximately the second to the eighth week after fertilization (after which it is usually termed a fetus). 2. 2. a thing at a rudimentary stage that shows potential for development."a simple commodity economy is merely the embryo of a capitalist economy" Copyright © Denise Senneca. All rights reserved