An initial ancestor.

(biochemistry, genetics) A complex of proteins required for the initiation of bacterial DNA synthesis

plural of primosome

The quality of being primordial.

The oceans of the earth at a time early in its history. The term generally implies either the time before or during the development of multi-cellular life forms (i.e., during the Precambrian), or alternatively before the development of the first land-based life forms (i.e. during the early Paleozoic).

plural of primordium

A krai in extreme southeastern Russia.

In a primordial manner. / With regard to a primordium.

plural of primogeniture

plural of primorial