heteroplasty

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The surgical grafting of tissue obtained from one individual or species to another.

from The Century Dictionary.

• noun A surgical operation, for the restoration of a lost part, in which the new skin or other tissue is taken from another individual.
• noun Abnormal formation of tissue; heteroplasia.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The grafting of tissue between different individuals of the same or different species