Tephra Definition
tĕfrə
noun
Clastic volcanic materials, as dust, ashes, or pumice, ejected during an eruption and carried through the air before deposition.
Webster's New World
Solid matter that is ejected into the air by an erupting volcano.
American Heritage
Other Word Forms of Tephra
Noun
Singular:
tephra
Plural:
tephrasOrigin of Tephra
-
Greek tephrā ash dhegwh- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
From the Ancient Greek τέφρα (tephra, “ash").
From Wiktionary
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