xenogenesis
— Noun
– English
~ the alternation of two or more different forms in the life cycle of a plant or animal
xenograft
— Noun
– English
~ tissue from an animal of one species used as a temporary graft (as in cases of severe burns) on an individual of another species
xenolith
— Noun
– English
~ (geology) a piece of rock of different origin from the igneous rock in which it is embedded