[ luh-pil-uhs ]
/ ləˈpɪl əs /
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noun, plural la·pil·li [luh-pil-ahy]. /ləˈpɪl aɪ/.
a small stony particle ejected from a volcano.
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Origin of lapillus
1740–50; <Latin: little stone, pebble, diminutive of lapis stone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use lapillus in a sentence
These ejections were followed by dark sand, with lapilli and small fragments of scori of the same colour.
With the lapilli, and sometimes without them, the smoke carried a very minute dust or sand, which is generally called ashes.
We observed, that when lava abounded, the projection of rocks and lapilli either ceased altogether, or became of small amount.
A cubic mile of material is said to have been thrown out in the form of lapilli and dust by the successive explosions.Wealth of the World's Waste Places and Oceania |Jewett Castello Gilson
There was no pumice shown to me, but the dust and lapilli all seemed to be composed of comminuted old rock.Complete Story of the San Francisco Horror|Richard Linthicum
British Dictionary definitions for lapillus
/ (ləˈpɪləs) /
noun plural -li (-laɪ)
a small piece of lava thrown from a volcano
Word Origin for lapillus
C18: Latin: little stone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for lapillus
[ lə-pĭl′əs ]
Plural lapilli (lə-pĭl′ī′)
A small fragment of lava, between 2 and 64 mm in size, blown out from a volcano.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.