Try Our Apps


Blech. These are the grossest words.


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 of -oid
< Greek -oeidēs, equivalent to -o- -o- + -eidēs having the form of, derivative of eîdos form Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for oid
Historical Examples
British Dictionary definitions for oid


suffix, suffix
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
Cite This Source
Word Origin and History for 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
Cite This Source
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.
Cite This Source
oid in Science
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.
Cite This Source
Slang definitions & phrases for oid



  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.
Cite This Source
oid in Technology
The Free On-line Dictionary of Computing, © Denis Howe 2010
Cite This Source
Related Abbreviations for oid


object identifier
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source

Word of the Day

Word Value for oid

Scrabble Words With Friends

Nearby words for oid