primordial

Being or happening first in sequence of time; original.

Primary or fundamental.

Belonging to or characteristic of the earliest stage of development of an organism or a part.

A basic principle.

First in order; earliest; original; primitive; existing from the beginning.

In anatomy, primitive; formative; in a rudimentary or embryonic state: opposed to definitive, or final, completed, or perfected: as, the primordial skull of man is partly membranous, partly cartilaginous.

In botany, first formed: applied to the first true leaves formed by a young plant, also to the first fruit produced on a raceme or spike.

In geology, containing the earliest traces of life.

Synonyms Prime, etc. See primary.

A first principle or element.