Transubstantiation /

In Roman Catholic theology, transubstantiation (in Latin, transsubstantiatio, in Greek μετουσίωσις metousiosis) means the change, in the Eucharist, of the substance (what the thing is in itself - see "Roman Catholic theology of transubstantiation", below) of wheat bread and grape wine into the substance of the Body and Blood (respectively) of Jesus, while all that is accessible to the senses (the species or appearances) remains as before. Some Greek Orthodox Church confessions of faith use the term "transubstantiation" (metousiosis), but most Orthodox Christian traditions play down the term itself, and the notions of "substance" and "accidents", while adhering to the holy mystery that bread and wine become the body and blood of Christ during a valid Divine Liturgy. Other terms such as "trans-elementation" (μεταστοιχείωσις metastoicheiosis) and "re-ordination" (μεταρρύθμισις metarrhythmisis) are more common among the Orthodox. The earliest known use of the term "transubstantiation" to describe the change from bread and wine to body and blood of Christ was by Hildebert de Lavardin, Archbishop of Tours (died 1133), in the eleventh century and by the end of the twelfth century the term