Quintessence n. : The fifth or last and highest essence or power in a natural body. See Ferment oils, under Ferment.

Quintessence n. : Hence: An extract from anything, containing its rarest virtue, or most subtle and essential constituent in a small quantity; pure or concentrated essence.

Quintessence v. t. : To distil or extract as a quintessence; to reduce to a quintessence.

Example:
Could the speed of light actually be set by "Quintessence"?

Taxonomy
Quintessence Publishing, International publisher, student dental, medical books, journals, symposia, trade books, imprint, Symposium, Comprehensive Care, the Celebration, 60th Anniversary, George Zarb, Order of Canada, Honorary Doctorate, DVD, BMP.

Defination from the web:
... Quintessence Announces the Launching of a New Symposium on Comprehensive Care. Quintessence ...