-oid

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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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Compare -ode¹.

Origin of -oid

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

Words nearby -oid

Ohrmazd, “Oh! Susanna”, ohv, Oi, OIC, -oid, -oidea, oidiomycin, oidium, oik, oil

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use -oid in a sentence

Erasistratos de kantautha proteron poisas to deuteron ouk oid' hops ouk aisthanetai.
On the Natural Faculties|Galen
Kaitoi taut' ouk oid' hops exnechthn eipein ou proelomenos all' hyp' auts tou logou ts akolouthias anankastheis.
On the Natural Faculties|Galen
Thallog′enous, belonging to the thallogens; Thall′oid, Thall′ose, resembling a thallus.
Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements)|Various
Varicell′ar, pertaining to varicella; Varicell′oid, resembling varicella.
Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements)|Various

Anthropoid, an′throp-oid, adj. in the form of or resembling man.
Chambers's Twentieth Century Dictionary (part 1 of 4: A-D)|Various

British Dictionary definitions for -oid

-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

Medical definitions for -oid

-oid

suff.

Resembling; one that resembles:cancroid.

Scientific definitions for -oid

-oid

A suffix meaning like or resembling, as in ellipsoid, a geometric solid that resembles an ellipse.