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.
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Origin of -oid
< Greek -oeidēs, equivalent to -o- -o- + -eidēs having the form of, derivative of eîdos form
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for -oid
suffix forming adjectives, suffix forming nouns
indicating likeness, resemblance, or similarityanthropoid
Word Origin for -oid
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
Medicine definitions for -oid
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.
Science definitions for -oid
A suffix meaning like or resembling, as in ellipsoid, a geometric solid that resembles an ellipse.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.