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Definitions from Wiktionary ()
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▸ adjective: (biology) Characteristic of the earliest stage of the development of an organism, or relating to a primordium.
▸ adjective: Primeval.
▸ adjective: Of 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 = 7×10⁸), potassium-40 (T = 1.25×10⁹), uranium-238 (T = 4.5×10⁹), and thorium-232 (T = 1.4×10¹⁰).
▸ noun: A first principle or element.
Similar:
primal,
primaeval,
primeval,
aboriginal,
early,
primitial,
primitive,
primigenial,
primigenous,
primative,
more...
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