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Latin word lapillus comes from Latin -illus (Used to form adjectives from nouns.), Latin lapis
-illus (Latin)
Used to form adjectives from nouns.
lapis (Latin)
(poetic) jewel, precious stone. Lapis Manalis in Latin "stone of manes" covers the gate of Hades or underworld. A boundary stone. A milestone. A statue. A stone. A stone platform at a slave auction. Gravestone, tombstone.
lapillus (Latin)
A precious stone, gem, jewel; marble.. A small stone, pebble.. A tombstone.. Stone in the bladder, gravel, calculus.