a highly incendiary jellylike substance used in fire bombs, flamethrowers, etc.
verb (used with object)
to drop bombs containing napalm on (troops, a city, or the like).

1940–45, Americanism; na(phthene) + palm(itate) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
napalm (ˈneɪpɑːm, ˈnæ-)
1.  a thick and highly incendiary liquid, usually consisting of petrol gelled with aluminium soaps, used in firebombs, flame-throwers, etc
2.  (tr) to attack with napalm
[C20: from na(phthene) + palm(itate)]

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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Word Origin & History

1942, from na(phthenic) palm(itic) acids, used in manufacture of the chemical that thickens gasoline. The verb is 1950, from the noun.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
napalm   (nā'päm')  Pronunciation Key 
A firm jelly made by mixing gasoline with aluminum salts (made of fatty acids). It is used in some bombs and in flamethrowers. Napalm was developed during World War II.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Abbreviations & Acronyms
naphthene + palmitate
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Heroic earthlings fought the aliens with dynamite, napalm, atomic torpedoes and
  bad acting.
It counts napalm and the cost of a nuclear warhead, and armored cars for police
  who fight riots in our streets.
The site has been bombed with napalm shells from aircraft and all bodies and
  wreckage is burning.
It counts napalm and counts nuclear warheads and armored cars for the police to
  fight the riots in our cities.
Related Words
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