combustible

[kuhm-buhs-tuh-buhl]
adjective
1.
capable of catching fire and burning; inflammable; flammable: Gasoline vapor is highly combustible.
2.
easily excited: a high-strung, combustible nature.
noun
3.
a combustible substance: Trucks carrying combustibles will not be allowed to use this tunnel.

Origin:
1520–30; < Late Latin combūstibilis. See combust, -ible

combustibility, combustibleness, noun
combustibly, adverb
uncombustible, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
combustible (kəmˈbʌstəbəl)
 
adj
1.  capable of igniting and burning
2.  easily annoyed; excitable
 
n
3.  a combustible substance
 
combusti'bility
 
n
 
com'bustibleness
 
n
 
com'bustibly
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

combustible
1520s, from Fr. combustible, from L.L. combustibilis, from combustus, pp. of combuere (see combustion). Fig. sense is from 1640s; as a noun, from 1680s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

combustible com·bus·ti·ble (kəm-bŭs'tə-bəl)
adj.
Capable of igniting and burning. n.
A substance that ignites and burns readily.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
No federal workplace standard exists for combustible dust.
Sociologists spoke up during those controversies, but they have also criticized
  less obviously combustible genetic studies.
The majority of that used oil is collected and sold as a combustible fuel,
  mainly used in power plants or industrial boilers.
Everywhere the complex mix of clans and sub-clans is combustible.
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