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Quinta essentia is latin and is used in modern laguage as the quintessence, menaing - literally - the fifth essence.

Plato's Timaeus posits the existence of a fifth element called quintessence, of which the cosmos and all celestial bodies are made. Ancient and medieval science had a similar view, but labelled it Aether - the material that fills the region of the universe above the terrestrial sphere.

Aristotle included aether in the system of the classical elements of Ionic philosophy as the fifth element, on the principle that the four terrestrial elements were subject to change and moved naturally in straight lines while no change had been observed in the celestial regions and the heavenly bodies moved in circles.

In Aristotle's system aether had no qualities (was neither hot, cold, wet, or dry), was incapable of change (with the exception of change of place), and by its nature moved in circles. Medieval scholastic philosophers granted aether changes of density, in which the bodies of the planets were considered to be denser than the medium which filled the rest of the universe. Robert Fludd stated that the aether was of the character that it was "subtler than light". Fludd cites the 3rd century view of Plotinus, concerning the aether as penetrative and non-material.

Quintessence, in modern language, is something that is the most perfect or typical example of it or something that is the aspect of it which seems to represent its central nature.

If you have anyting of quintessence to say - say it here.