Definition of tephra in English:

tephra

Syllabification: teph·ra
Pronunciation: /ˈtefrə
 
/

noun

Geology
Rock fragments and particles ejected by a volcanic eruption.
More example sentences
  • Any such lateral motions could contribute to the absence or thinness of distal marine tephra layers on submarine high points or steep slopes.
  • Two types of tephra fallout deposits have been observed.
  • Some reports are stating that that tephra rim could collapse later this year.

Origin

1940s: from Greek, literally 'ash, ashes'.

Definition of tephra in:

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verb
be of the opinion; think or suppose