Hey you! Yes, you! Thank you for adding beauty to the world!
Definitions of classis:
noun: (obsolete) A class or order; sort; kind.
noun: (religion) An ecclesiastical body or judicatory in certain churches, such as the Reformed Dutch. It is intermediate between the consistory and the synod, and corresponds to the presbytery in the Presbyterian church.
noun: (biology, taxonomy) A category in the classification of organisms, ranking below divisio and above ordo.