Essence or inherent nature of thing
In scholastic philosophy, "quiddity" (/ˈkwɪdɪti/; Latin: quidditas)[1] was another term for the essence of an object, literally its "whatness" or "what it is".
- ^ Thomas Aquinas, Summa Theologiae, London: Blackfriars, 1964–1976: i, quaest. 84, art. 7: "quidditas sive natura in materia corporali".