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Trojan

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Tro⋅jan

[troh-juhn]
–adjective
1. of or pertaining to ancient Troy or its inhabitants.
–noun
2. a native or inhabitant of Troy.
3. a person who shows pluck, determination, or energy: to work like a Trojan.

Origin:
bef. 900; ME; OE Trōiān < L Trōjānus, equiv. to Trōj(a) Troy + -ānus -an
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Tro·jan 1   (trō'jən)   
n.  
  1. A native or inhabitant of ancient Troy.

  2. A person of courageous determination or energy.


[Middle English, from Latin Trōiānus, from Trōia, Troy, from Greek, from Trōs, the mythical founder of Troy.]
Tro'jan adj.
Tro·jan 2   (trō'jən)   
adj.  Of or relating to a celestial body, especially an asteroid, that is in one of the Lagrangian points of a two-body system. Used especially of any of a group of asteroids that orbit at Jupiter's distance from the sun, but 60° ahead of or behind the planet.

[From the names of heroes of the Trojan War used for these asteroids.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

Trojan 
O.E. Troian "of or pertaining to ancient Troy," from L. Trojanus, from Troia, Troja "Troy," from Gk. Tros, name of a king of Phrygia, the mythical founder of Troy. In 17c., it was a colloquial term for "person of dissolute life, carousing companion." The trade name for a brand of prophylactic contraceptive was registered 1927 in U.S. Trojan horse is attested from 1574; the computer virus sense is attested by 1982.
Online Etymology Dictionary, © 2001 Douglas Harper
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Computing Dictionary

trojan
Trojan horse

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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Idioms & Phrases

Trojan

see under work like a beaver (trojan).

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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