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Certain rock fragment
Answer for the clue "Certain rock fragment ", 8 letters:
xenolith
Word definitions for xenolith in dictionaries
Wikipedia
Word definitions in Wikipedia
A xenolith is a rock fragment which becomes enveloped in a larger rock during the latter's development and hardening. In geology , the term xenolith is almost exclusively used to describe inclusions in igneous rock during magma emplacement and eruption. ...
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
1894, from xeno- "foreign, strange" + -lith "stone."
WordNet
Word definitions in WordNet
n. (geology) a piece of rock of different origin from the igneous rock in which it is embedded
Wiktionary
Word definitions in Wiktionary
n. (context geology English) any piece of rock having a different origin to that of the igneous rock in which it is found