adj. 1. Being or happening first in sequence of time; original. 2. Primary or fundamental: play a primordial role. 3. Biology Belonging to or characteristic of the earliest stage of development of an organism or a part: primordial cells. n. A basic principle. [Middle English, from Late Latin prīmōrdiālis, from Latin prīmōrdium, origin : prīmus, first; see per1 in the Appendix of Indo-European roots + ōrdīrī, to begin to weave; see ar- in the Appendix of Indo-European roots.] pri·mordi·al·ly adv. |
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