[with sing. or pl. v.] clastic volcanic materials, as dust, ashes, or pumice, ejected during an eruption and carried through the air before deposition
Origin of tephrafrom Gr: see tephrite
Solid matter that is ejected into the air by an erupting volcano.
Origin of tephraGreek tephrā ash ; see dhegwh- in Indo-European roots.
(countable and uncountable, plural tephras)
From the Ancient Greek Ï„ÎÏ†ÏÎ± (tephra, “ash").