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xenocryst

Syllabification: xen·o·cryst
Pronunciation: /ˈzenəˌkrist, ˈzēnə-
 
/

Definition of xenocryst in English:

noun

Geology
A crystal in an igneous rock that is not derived from the original magma.
Example sentences
  • This could represent a xenocryst derived from Archaean basement rocks of the region.
  • Again, the lack of zircon xenocrysts in this sample does not allow discrimination between these alternatives.
  • The xenocrysts provide evidence that earlier Neoproterozoic rocks were present in the region and that locally rocks date back to 1929 Ma.

Origin

late 19th century: from xeno- 'foreign' + crystal.

Definition of xenocryst in:

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