Sanctus

Definitions:

An anthem, originally commencing with the Latin word sanctus, holy.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)

Usage examples:

At Bosham Harbour the fishermen used to so join in the service of the sanctuary, and it is said that when George Herbert's sanctus bell sounded for prayers, the ploughmen stopped from their work for a few moments and prayed.
- English Villages by P. H. Ditchfield
Cicero mentions that Ennius applied the epithet sanctus to poets.
- The Roman Poets of the Republic by W. Y. Sellar
Cum Evangelium audimus aut cogitamus aut sacramenta tractamus et fide nos consolamur simul est efficax Spiritus Sanctus
- Historical Introductions to the Symbolical Books of the Evangelical Lutheran Church by Friedrich Bente