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simultaneous

 - 3 dictionary results

si⋅mul⋅ta⋅ne⋅ous

  [sahy-muhl-tey-nee-uhs, sim-uhl-]
Use simultaneous in a Sentence
–adjective
existing, occurring, or operating at the same time; concurrent: simultaneous movements; simultaneous translation.
Origin:
1650–60; < L simul together (see similar ) + (instan)taneous

Related forms:
si⋅mul⋅ta⋅ne⋅ous⋅ly, adverb
si⋅mul⋅ta⋅ne⋅ous⋅ness, si⋅mul⋅ta⋅ne⋅i⋅ty  [sahy-muhl-tuh-nee-i-tee, sim-uhl-] , noun

Synonyms:
synchronous, coincident.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To simultaneous
si·mul·ta·ne·ous   (sī'məl-tā'nē-əs, sĭm'əl-)   
adj.  

  1. Happening, existing, or done at the same time. See Synonyms at contemporary.

  2. Mathematics Containing variables for which there are values that can satisfy all the equations: simultaneous equations.


[Latin simul, at the same time; see sem-1 in Indo-European roots + English -taneous (as in instantaneous).]
si'mul·ta'ne·ous·ly adv., si'mul·ta'ne·ous·ness, si'mul·ta·ne'i·ty (-tə-nē'ĭ-tē, -nā'-) n.
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

simultaneous 
1652 (implied in simultaneity), from L.L. simultaneus, from L. simul "at the same time" (see similar) + -taneous, abstracted from spontaneous, etc.
Online Etymology Dictionary, © 2001 Douglas Harper
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