E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
The kingdom of Queen Quintessence in the famous satirical romance of Rabelais called the History of Gargantua and Pantagruel. Pantagruel and his companions went thither in search of the Holy Bottle. It may be called the city of speculative science.
The word is used to express the realisation of a beau ideal. Lovers have preconceived notions of human perfections, and imagine that they see the realities in the person beloved, who is the entelechy of their beau ideal.