embryo

An embryo (Greek: , plural ) is a multicellular diploid eukaryote in its earliest stage of development, from the time of first cell division until birth, hatching, or germination. In humans, it is called an embryo from the moment of fertilisation until the end of the 8th week of gestational age, whereafter it is instead called a fetus.
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n. embryo, fetus, young of a human or animal in its early stages

n. embryo, fetus, young of a human or animal in its early stages

(n.)
The young of an animal in the womb, or more specifically, before its parts are developed and it becomes a fetus (see Fetus).
  

(n.)
The germ of the plant, which is inclosed in the seed and which is developed by germination.
  

(n.)
The first rudiments of an organism, whether animal or plant
  

(a.)
Pertaining to an embryo; rudimentary; undeveloped; as, an embryo bud.