Transubstantiation
From ReformedWiki.org
Transubstantiation (latin. transubstantiatio; Greek. μετουσίωσις metousiosis) is a Roman Catholic doctrine regarding the Eucharist. The Roman Catholic Church teaches that "[t]he Eucharist is the very sacrifice of the Body and Blood of the Lord Jesus which he instituted to perpetuate the sacrifice of the cross throughout the ages until his return in glory"[1]. Transubstantiation is specifically the idea that the Eucharist literally becomes the Body and Blood of Jesus when blessed by the priest.[2][3][4].
