xenocryst
Concise Oxford English Dictionary © 2008 Oxford University Press:
xenocryst /ˈzɛnə(ʊ)krɪst/
▶noun Geology a crystal in an igneous rock which is not derived from the original magma.
– derivatives
xenocrystic adjective.
xenocrystic adjective.
'xenocryst' also found in these Oxford entries:

