primordial
Meanings
adj
- First, earliest or original.
- Characteristic of the earliest stage of the development of an organism, or relating to a primordium.
- Primeval.
- 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.
- A primordial condition or state.
Pronunciation
Word forms
Etymology
From the Latin prīmōrdiālis (“of the beginning”). Compare primordium and -al.
Related words
Derived words
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