One of the mysteries of the English language finally explained.
1As a count noun: a primal thing; an essential or fundamental concept. As a mass noun: the quality or condition of being primal; primacy.
2Mathematics. The property of being a prime number.
Mid 17th century; earliest use found in Richard Baxter (1615–1691), ejected minister and religious writer. From primal + -ity. In sense 1 apparently originally after post-classical Latin primalitas; compare also Italian primalità.
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