noun.
The fetus or embryo, including all the surrounding tissuesprotecting and nourishing it during pregnancy.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
Word Usage
"The conceptus from the very beginning is a human reality."