lapilli

(redirected from Acretionary lapilli)
Also found in: Encyclopedia.
Related to Acretionary lapilli: lapillus

la·pil·lus

 (lə-pĭl′əs)
n. pl. la·pil·li (-pĭl′ī′)
A small, solidified fragment of lava.
[Latin, diminutive of lapis, stone.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.