Definition of tephra in English:

tephra

Line breaks: tephra
Pronunciation: /ˈtɛfrə
 
/

noun

[mass 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'.

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