Word Study
lapilli (root: lapillus)
CIDE DICTIONARY
lapilli, n. pl. [L. lapillus a little stone, dim. of lapis stone.].
Volcanic ashes, consisting of small, angular, stony fragments or particles. [1913 Webster]
OXFORD DICTIONARY
lapilli, n.pl. stone fragments ejected from volcanoes.
Etymology
It. f. L, pl. dimin. of lapis stone
For further exploring for "lapilli" in Webster Dictionary Online


(NT only) to listen to the NET Bible