wafer: thin disk of unleavened bread used in a religious service (especially in the celebration of the Eucharist)
bread: food made from dough of flour or meal and usually raised with yeast or baking powder and then baked
rosidae: a group of trees and shrubs and herbs mostly with polypetalous flowers; contains 108 families including Rosaceae; Crassulaceae; Myrtaceae; Melastomaceae; Euphorbiaceae; Umbelliferae