Eutyches Share definition Flag The monk that is followed by Eutychians. He taught the doctrine that Jesus Christ has only one nature and does not have a human nature. Eutyches created a form of Christian belief. - Def by Juliëtte Eutyches by Jafje July 30, 2007 0 0 Get merch Get the Eutyches mug. Buy Now — $32.95 See more merch