- a small stony particle ejected from a volcano.
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. 2018
Examples from the Web for lapilli
The lapilli and the ashes were carried to greater distances.The Eruption of Vesuvius in 1872
Evidently the only things thrown out from them have been gases, volcanic ashes, and lapilli.The Voyage of the Vega round Asia and Europe, Volume I and Volume II
The solid matter thrown out by volcanoes consists of lapilli, scoriae, dust and bombs.The San Francisco Calamity
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
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
- a small piece of lava thrown from a volcano
C18: Latin: little stone
- 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.