A stage in the development of an animal between cleavage of a fertilised egg and birthor hatching. In humans it is called a foetus after 8 weeks.

EMBRYO: "The embryo in the egg hatched to become a fluffy yellow chick."
Cite this page: N., Pam M.S., "EMBRYO," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/embryo/ (accessed January 14, 2021).