synchronous

[sing-kruh-nuhs]
adjective
1.
occurring at the same time; coinciding in time; contemporaneous; simultaneous.
2.
going on at the same rate and exactly together; recurring together.
3.
Physics, Electricity. having the same frequency and zero phase difference.
4.
Computers, Telecommunications. of, pertaining to, or operating using fixed-time intervals controlled by a clock (opposed to asynchronous ).
5.
Aerospace. geostationary.

Origin:
1660–70; < Late Latin synchronus < Greek sýnchronos, equivalent to syn- syn- + chrón(os) time + -os adj. suffix; see -ous

synchronously, adverb
synchronousness, noun
nonsynchronous, adjective
nonsynchronously, adverb
nonsynchronousness, noun
unsynchronous, adjective
unsynchronously, adverb
unsynchronousness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
synchronous (ˈsɪŋkrənəs)
 
adj
1.  occurring at the same time; contemporaneous
2.  physics (of periodic phenomena, such as voltages) having the same frequency and phase
3.  occurring or recurring exactly together and at the same rate: the synchronous flapping of a bird's wings
 
[C17: from Late Latin synchronus, from Greek sunkhronos, from syn- + khronos time]
 
'synchronously
 
adv
 
'synchronousness
 
n

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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Etymonline
Word Origin & History

synchronous
1669, "existing or happening at the same time," from L.L. synchronus "simultaneous," from Gk. synchronos "happening at the same time," from syn- "together" + khronos "time." Meaning "recurring at the same successive instants of time" is attested from 1677.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

synchronous syn·chro·nous (sĭng'krə-nəs, sĭn'-)
adj.
Occurring or existing at the same time.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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FOLDOC
Computing Dictionary

synchronous definition

operating system, communications
1. Two or more processes that depend upon the occurrences of specific events such as common timing signals.
2. Occurring at the same time or at the same rate or with a regular or predictable time relationship or sequence.
Opposite: asynchronous.
(1996-04-11)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
The rest of nature is more synchronous when it comes to being born.
Real-time and speedy synchronous and asynchronous communication options abound.
The rotor's magnetic field is rotating at the same speed as that of the stator,
  as in a synchronous machine.
The duo's gravity puts them in a synchronous orbit, which means they face each
  other with the same side all the time.
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