late 14c., from Late Latin primordialis "first of all, original," from Latin primordium "a beginning, the beginning, origin, commencement," from primus "first" (see prime (adj.)) + stem of ordiri "to begin" (see order (n.)). Related: Primordially.
primordial pri·mor·di·al (prī-môr'dē-əl)adj.
Being or happening first in sequence of time; primary; original.
Belonging to or characteristic of the earliest stage of development of an organism or a part.
Relating to a primordium.