Lapillus definition

lə-pĭləs
Frequency:
A small, solidified fragment of lava.
noun
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A small fragment of igneous rock, up to the size of a walnut, ejected from a volcano.
noun
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A small fragment of lava, between 2 and 64 mm in size, blown out from a volcano.
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Origin of lapillus

  • Latin diminutive of lapis stone

    From American Heritage Dictionary of the English Language, 5th Edition