Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The embryotic development of cross-species structures or characteristics.

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

  • n. introduction during embryonic development of characters or structure not present in the earlier evolutionary history of the strain or species (such as the addition of the placenta in mammalian evolution)

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