/kon'seuhb stan'shee ay"sheuhn/ , n. Theol.
the doctrine that the substance of the body and blood of Christ coexist in and with the substance of the bread and wine of the Eucharist.
[ 1590-1600; consubstantiation- (s. of consubstantiatio ), equiv. to con- CON- + ( trans ) substantiation- TRANSUBSTANTIATION ]