tran·sub·stan·ti·a·tion /-ˌstæn(t)ʃiˈeʃən/



 Tran·sub·stan·ti·a·tion n.
 1. A change into another substance.
 2. R. C. Theol. The doctrine held by Roman Catholics, that the bread and wine in the Mass is converted into the body and blood of Christ; -- distinguished from consubstantiation, and impanation.

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 transubstantiation
      n 1: the Roman Catholic doctrine that the whole substance of the
           bread and the wine changes into the substance of the
           body and blood of Christ when consecrated in the
           Eucharist
      2: an act that changes the form or character or substance of
         something [syn: transmutation]