Obs. rare. [f. Jansen (see below) + -IAN.] JANSENIST.
1653. Nicholas Pap. (Camd.), II. 10. They were to have gone upon the account of the Jansenians.
1657. Baxter, Acc. Pres. Th., 33. The Jansenians, and other Dominicans.
Hence † Jansenianism = JANSENISM.