-oid Definition
oid
suffix
Resembling; having the appearance of; related to.
Acanthoid.
American Heritage
One that resembles something specified or has a specified quality.
Humanoid.
American Heritage
affix
Like or resembling (something specified)
Crystalloid.
Webster's New World
Something resembling (something specified)
Celluloid, android.
Webster's New World
Origin of -oid
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Gr -o-eidēs < -o-, termination of preceding element + -eidēs, -oid < eidos, a form, shape < IE base *weid-, to see > idea, wise, L videre
From Webster's New World College Dictionary, 5th Edition
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Greek -oeidēs from eidos shape, form weid- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
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