Embryonic (adjective)

1. Relating to an embryo, or the earliest stage of development of an organism before birth or hatching.
2. Very young or just beginning to develop; in an early stage of growth or development.
3. Lacking complexity, maturity, or differentiation; rudimentary or underdeveloped.

Origin:

From latin embryo, from ancient greek ἔμβρυον (émbruon, "young one, fetus, sprout"), from ἐν- (en-) + βρύω (brúō, "to swell").

Examples:

1. The human embryo is fully formed after just eight weeks of development.
2. The company was in its embryonic stage, with only a handful of employees.
3. The singer had an embryonic talent for singing, but still needed years of practice.
4. The embryonic state of the project meant it was still in the planning phase.
5. The new system was still in its embryonic phase and would take some time to mature.