heterograft

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

• noun A type of tissue graft in which the donor and recipient are of different species.

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

• noun A tissue graft taken from a species different from that of the recipient.
• verb To perform a tissue graft using tissue taken from a species different from that of the recipient.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun tissue from an animal of one species used as a temporary graft (as in cases of severe burns) on an individual of another species