xenogenesis

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

• noun The supposed production of offspring markedly different from either parent.

from The Century Dictionary.

• noun The generation of offspring which pass through an entirely different life-cycle from that of the parents, and never exhibit the characters of the latter: a mode of biogenesis supposed by Milne-Edwards to occur, but not proved to have any existence in fact.

from the GNU version of the Collaborative International Dictionary of English.

• noun Same as heterogenesis.
• noun The fancied production of an organism of one kind by an organism of another.

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

• noun A foreign origin or source.
• noun biology The production of an offspring that is unlike either of its parents.

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

• noun the alternation of two or more different forms in the life cycle of a plant or animal