Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Solid matter that is ejected into the air by an erupting volcano.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun geology The solid material thrown into the air by a volcanic eruption that settles on the surrounding areas.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Greek tephrā, ash; see dhegwh- in Indo-European roots.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From the Ancient Greek τέφρα (tephra, "ash").

Examples

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Comments

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  • Geol.

    Dust and rock fragments that have been ejected into the air by a volcanic eruption. (OED)

    March 11, 2007