The outer vestment worn by the priest in saying Mass, consisting, in the Roman Catholic Church, of a broad, flat, back piece, and a narrower front piece, the two connected over the shoulders only. The back has usually a large cross, the front an upright bar or pillar, designed to be emblematical of Christ's sufferings.
He reached the point where he wondered if he were not committing a sacrilege in possessing objects which had once been consecrated: the Church canons, chasubles and pyx covers.
Joris-Karl Huysmans. À Rebours
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Then he promised the Holy Virgin three chasubles for the church, and that he would go barefooted from the cemetery at Bertaux to the chapel of Vassonville.
Gustave Flaubert. Madame Bovary
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“Filthy creature! Filthy creature!” it made the saintly kindness and unction of our servant rather less prominent than it would do, next day at dinner, when it made its appearance in a skin gold-embroidered like a chasuble, and its precious juice was poured out drop by drop as from a pyx.