cobra

1 [koh-bruh]
noun
1.
any of several highly venomous, Old World elapid snakes of the genera Naja and Ophiophagus, characterized by the ability to flatten the neck into a hoodlike form when disturbed.
2.
any of several similar, related African snakes, as the ringhals.
3.
leather made from the skin of a cobra.
4.
(initial capital letter) Military. a single-engine, two-seat U.S. Army attack helicopter armed with missiles, rockets, and a 20mm cannon and in service since 1977.

Origin:
1810–20; short for cobra de capello

Dictionary.com Unabridged

cobra

2 [koh-bruh, kob-ruh]
noun Australian.
head; skull.

Origin:
1825–35; < Dharuk gabarā

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
cobra (ˈkəʊbrə)
 
n
1.  any highly venomous elapid snake of the genus Naja, such as N. naja (Indian cobra), of tropical Africa and Asia. When alarmed they spread the skin of the neck region into a hood
2.  any related snake, such as the king cobra
 
[C19: from Portuguese cobra (de capello) snake (with a hood), from Latin colubra snake]

COBRA (ˈkəʊbrə)
 
n acronym for
(in the UK) Cabinet Office Briefing Room A: the civil contingencies committee that leads the UK's responses to crises such as terrorist attacks and epidemics

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

cobra
1802, from Port. cobra (de capello) "serpent (of the hood)," from L. colubra "a snake," of uncertain origin. The word came to Eng. via Portuguese colonies in India, where the native name is nag.
Online Etymology Dictionary, © 2010 Douglas Harper
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FOLDOC
Computing Dictionary

COBRA definition

spelling
Do you mean CORBA? Or is there a COBRA?
(1996-05-10)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Abbreviations & Acronyms
COBRA
Consolidated Omnibus Budget Reconciliation Act
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
And other snakes are set to join the ranks of the sequenced, including the
  garter snake, the rattlesnake and the king cobra.
The real problem is the criminal you cannot reform: the human mad dog or cobra.
If you're smart, you'll never come within spitting distance of a cobra.
One sound signals the approach of a martial eagle, another warns that a cobra
  slithers nearby.
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