transubstantiate
Concise Oxford English Dictionary © 2008 Oxford University Press:
transubstantiate /ˌtransəbˈstanʃɪeɪt, ˌtrɑːn-, -sɪ-/
▶verb
- 1 Christian Theology convert (the substance of the Eucharistic elements) into the body and blood of Christ at consecration.
- 2 change the form or substance of (something) into something different.
– origin ME: from med. L. transubstantiat-, transubstantiare ‘change in substance’.
'transubstantiate' also found in these Oxford entries:

