tephra Hear it!

tephra definition

tephra (tef′rə)

plural noun

clastic volcanic materials, as dust, ashes, or pumice, ejected during an eruption and carried through the air before deposition

Etymology: < Gr: see tephrite

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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