inchoate
(in·'koh·it)
[adj.]
1. just begun; in an initial or early stage of development, incipient.
2. not yet fully formed, undeveloped, incomplete.
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ExampleExample
During the inchoate stage of fetal growth, it is difficult to distinguish between a cow, a frog, or a human; as they mature, the developing embryos take on the characteristics of their own particular species.