Lapilli is a size classification of tephra, which is material that falls out of the air during a volcanic eruption or during some meteorite impacts. Lapilli is Latin for "little stones". By definition lapilli range from 2 to 64 mm in diameter.

What does lapilli mean in English?

Lapilli (singular: lapillus) is Latin for "little stones". By definition lapilli range from 2 to 64 mm (0.08 to 2.52 in) in diameter. A pyroclastic particle greater than 64 mm in diameter is known as a volcanic bomb when molten, or a volcanic block when solid.

What does the word scoria mean?

1 : the refuse from melting of metals or reduction of ores : slag. 2 : rough vesicular cindery lava. Other Words from scoria Example Sentences Learn More About scoria.