transubstantiation(redirected from Transsubstantiationism)
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[Gr.,=thanksgiving], Christian sacrament that repeats the action of Jesus at his last supper with his disciples, when he gave them bread, saying, "This is my body," and wine, saying, "This is my blood." (Mat. 26; Mark 14; Luke 22; 1 Cor. 11.
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changing of bread to body of Christ. [Christian Theol.: Brewer Dictionary, 1097]
(esp in Roman Catholic theology)
a. the doctrine that the whole substance of the bread and wine changes into the substance of the body and blood of Christ when consecrated in the Eucharist
b. the mystical process by which this is believed to take place during consecration