1. (n.) An identity or union of substance.

2. (n.) The actual, substantial presence of the body of Christ with the bread and wine of the sacrament of the Lord's Supper; impanation; -- opposed to transubstantiation.

assimilation avatar basal metabolism catabolism catalysis consubstantiation displacement heterotopia metabolism metagenesis metamorphism metamorphosis metastasis metathesis metempsychosis mutant mutated form mutation permutation reincarnation sport transanimation transfiguration transfigurement transformation transformism translation translocation transmigration transmogrification transmutation transposition transubstantiation