Utraquism
Utraquism (from the Latin sub utraque specie, meaning "under both kinds"), also called Calixtinism (from chalice; Latin: calix, borrowed from Greek kalyx, "shell, husk"; Czech: kališníci), was a belief amongst Hussites, a pre-Protestant reformist Christian movement in fifteenth century Bohemia that communion under both kinds (both the consecrated host and the precious blood, as opposed to the consecrated host alone) should be administered to the laity during the celebration of the Eucharist. Communion in both kinds was a principal dogma of the Hussites and one of the Four Articles of Prague.