Definitions
1.AdjectiveFirst, earliest or original.
2.AdjectiveCharacteristic of the earliest stage of the development of an organism, or relating to a primordium."a primordial leaf; a primordial cell"
3.AdjectivePrimeval.
4.AdjectiveOf an element or isotope: occurring primordially (on Earth) (i.e. inherited from when the Earth was formed); because it is stable, or radioactive but so long-lived that some is left over from when the Earth was formed. For example, primordial radioisotopes (T = half-life in years) include uranium-235 (T = 7×10), potassium-40 (T = 1.25×10), uranium-238 (T = 4.5×10), and thorium-232 (T = 1.4×10).
5.NounA first principle or element.
6.NounA primordial condition or state.