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lapilli

Pronunciation: /ləˈpɪlʌɪ/
Definition of lapilli

noun

Geology
  • rock fragments ejected from a volcano.

Origin:

mid 18th century (in the general sense 'stones, pebbles'): via Italian from Latin, plural of lapillus, diminutive of lapis 'stone'

lapilli in other Oxford dictionaries

Definition of lapilli in the US English dictionary
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