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-oid

1.
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
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for oid

-oid

suffix, suffix
1.
indicating likeness, resemblance, or similarity: anthropoid
Word Origin
from Greek -oeidēs resembling, form of, from eidos form
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for oid

-oid

word-forming element meaning "like, like that of, thing like a ______," from Latinized form of Greek -oeides, from eidos "form," related to idein "to see," eidenai "to know;" literally "to see," from PIE *weid-es-, from root *weid- "to see, to know" (see vision). The -o- is connective or a stem vowel from the previous element.

Online Etymology Dictionary, © 2010 Douglas Harper
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oid in Medicine

-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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oid in Science
-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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Slang definitions & phrases for oid

-oid

suffix
  1. used to form adjectives Resembling or imitating what is indicated: blitzoid/ cheesoid/ technoid/ zomboid
  2. used to form nouns Something resembling or imitating what is indicated: flakoid/ fusionoid/ Grouchoid/ klutzoid •This
  3. is increasingly current, probably because of the popularity of fantasy and science fiction, esp among teenagers

[fr the scientific suffix -oid, fr Greek -oeides, ultimately fr eidos, ''image, form''; dictionaries list over 1,800 -oid compounds, most of which date from the 1700s and 1800s]


The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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oid in Technology
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Related Abbreviations for oid

OID

object identifier
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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