em·bryo 
/ˈɛmbriˌoʊ/ noun
plural em·bry·os /ˈɛmbriˌoʊ/ noun [count] : a human or animal in the early stages of development before it is born, hatched, etc. — compare fetus
in embryo
formal : in an early or undeveloped stage
▪ The ideas he explored fully in his later work can be seen in embryo in his early books.
▪ The ideas he explored fully in his later work can be seen in embryo in his early books.
