-oid

-oid

a suffix meaning “resembling,” “like,” used in the formation of adjectives and nouns (and often implying an incomplete or imperfect resemblance to what is indicated by the preceding element): alkaloid; anthropoid; cardioid; cuboid; lithoid; ovoid; planetoid.
Compare -ode1.


Origin:
< Greek -oeidēs, equivalent to -o- -o- + -eidēs having the form of, derivative of eîdos form

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
-oid
 
suffix forming adjectives, —suffix forming nouns
indicating likeness, resemblance, or similarity: anthropoid
 
[from Greek -oeidēs resembling, form of, from eidos form]

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

-oid
suffix for "like, like that of," from Gk. -oeides, from eidos "form," related to idein "to see," eidenai "to know;" lit. "to see," from PIE *weid-es-, from base *weid- "to see, to know" (see vision).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

-oid suff.
Resembling; one that resembles: cancroid.

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
Science Dictionary
-oid  
A suffix meaning "like" or "resembling," as in ellipsoid, a geometric solid that resembles an ellipse.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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FOLDOC
Computing Dictionary

-oid definition

jargon
(from "android") A suffix used as in mainstream English to indicate a poor imitation, a counterfeit, or some otherwise slightly bogus resemblance. Hackers will happily use it with all sorts of non-Greco/Latin stem words that wouldn't keep company with it in mainstream English. For example, "He's a nerdoid" means that he superficially resembles a nerd but can't make the grade; a "modemoid" might be a 300-baud modem (Real Modems run at 144000 or up); a "computeroid" might be any bitty box.
"-oid" can also mean "resembling an android", which was once confined to science-fiction fans and hackers. It too has recently (in 1991) started to go mainstream (most notably in the term "trendoid" for victims of terminal hipness). This is probably traceable to the popularisation of the term droid in "Star Wars" and its sequels.
Coinages in both forms have been common in science fiction for at least fifty years, and hackers (who are often SF fans) have probably been making "-oid" jargon for almost that long (though GLS and ESR can personally confirm only that they were already common in the mid-1970s).
[Jargon File]
(1999-07-10)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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