(redirected from pre-embryonic)
Also found in: Medical.


n. pl. pre-em·bry·os
A fertilized ovum up to 14 days old, before it becomes implanted in the uterus.

pre-em′bry·on′ic (-ŏn′ĭk) adj.


(Biology) the structure formed after fertilization of an ovum but before differentiation of embryonic tissue
References in periodicals archive ?
The minister further added that water management through furrow irrigation system, disease free nurseries, development of comprehensive orchard management protocols, pre-embryonic mango variety import, identification of new markets and development of improved post harvest practices are the efforts that have contributed much towards mango and citrus production.
For over 30 years research has shown that alcohol is a teratogen that is capable of effecting the growth and development of the fetus from pre-embryonic and embryonic development through to and including fetal growth.
This is about using pre-embryonic cells to do research that has the potential to ease the suffering of millions of people in this country.