tephra

[tef-ruh]

teph·ra

[tef-ruh]
noun (used with a plural verb)
clastic volcanic material, as scoria, dust, etc., ejected during an eruption.

Origin:
1960–65; < Greek téphra (singular) ashes
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Tephra is always a great word to know.
So is zedonk. Does it mean:
the offspring of a zebra and a donkey.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
Collins
World English Dictionary
tephra (ˈtɛfrə)
 
n
chiefly (US) solid matter ejected during a volcanic eruption
 
[C20: Greek, literally: ashes]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
tephra   (těf'rə)  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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