Embryo
/ˈɛmbriˌoʊ/
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Definition
(noun) In the reproductive cycle, the stage after the fertilization of the egg that precedes the development into a fetus.
Sentence Examples
The point at which an embryo becomes a fetus has apparently been chosen arbitrarily.
A developing embryo connects to the placenta via the umbilical cord.
CEFR Practice Quiz
A tiny ____ begins to develop into a baby during pregnancy.