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ergo-

1
a combining form meaning “work”: ergograph.
Also, especially before a vowel, erg-.


Origin:
combining form representing Greek érgon

ergo-

2
a combining form of ergot: ergotoxine.

Origin:
< French

cogito, ergo sum

[koh-gi-toh er-goh soom; English koj-i-toh ur-goh suhm, er-goh]
Latin.
I think, therefore I am (stated by Descartes as the first principle in resolving universal doubt).

post hoc, ergo propter hoc

[pohst hohk, er-goh prohp-ter hohk; English pohst hok, ur-goh prop-ter hok er-goh]
Latin.
after this, therefore because of it: a formula designating an error in logic that accepts as a cause something that merely occurred earlier in time.
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World English Dictionary
cogito, ergo sum (Latin ˈkɒɡɪˌtəʊ ˈɜːɡəʊ ˈsʊm)
 
I think, therefore I am; the basis of Descartes' philosophy

ergo1 (ˈɜːɡəʊ)
 
sentence connector
therefore; hence
 
[C14: from Latin: therefore]

ergo2 (ˈɜːɡəʊ)
 
n
informal short for ergometer

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

ergo
c.1400, from L. ergo "therefore," possibly from *ex rogo "from the direction," from ex "out of" + root of regere "to guide" (see regal).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ergo- pref.
Work: ergometer.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Cultural Dictionary
ergo [(er-goh, ur-goh)]

Latin word meaning “therefore”; usually used to show a logical conclusion: “Birds are warm-blooded animals, and reptiles are cold-blooded animals; ergo, no bird is a reptile.”

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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American Heritage
Abbreviations & Acronyms
ERGO
Euthanasia Research and Guidance Organization
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
The ergo guy breezes through the office every few months to adjust our lumbar supports, but nothing ever fixed my slouch.
Ergo the idea for a museum that would contain those vaunted scents lost to history.
Ergo an approach according to the new science of complexity is necessary, rather than detailed prescriptions.
Ergo: people who direct dissertations need to have name recognition.
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