The story
From Blanchard + -ism, after Pierre-Louis Blanchard (1758–1826), a French priest and polemicist, one of the leaders of the movement.
Etymology from Wiktionary, CC BY-SA 4.0.
Blanchardism
Today it means: A Catholic schism that emerged in the early 19th century among exiled French clergy who, having fled to England after the French Revolution, opposed the Concordat of 1801, an agreement between Napoleon Bonaparte and Pope Pius VII that sought national reconciliation between the revolutionaries and the Church. Full definition →