teph·ra (t f r )n. Solid matter that is ejected into the air by an erupting volcano. [Greek tephr  , ash; see dhegwh- in Indo-European roots.] |
tephra [ˈtɛfrə]
n
(Earth Sciences / Geological Science) Chiefly US solid matter ejected during a volcanic eruption
[Greek, literally: ashes]
| tephra (tfr) Solid matter, such as ash, dust, and cinders, that is ejected into the air by an erupting volcano. Tephra is a general term for all pyroclastic materials ejected from a volcano. |
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