lapillus

play
noun la·pil·lus \lə-ˈpi-ləs\

Definition of lapillus

plural

lapilli

play \lə-ˈpi-ˌlī, -(ˌ)lē\
  1. :  a small stony or glassy fragment of lava ejected in a volcanic eruption

Origin and Etymology of lapillus

Latin, diminutive of lapis


First Known Use: 1747


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not embarrassed or apologetic

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