-oid
resembling
From Greek -oeides, having the form of, from eidos, form
Meaning
What does -oid mean?
-oid is a suffix meaning resembling. It comes from Greek -oeides, having the form of, from eidos, form.
It means like, not the same as: lipoid is fatlike, and a carcinoid tumor resembles a carcinoma but usually grows slowly.
In real words
Medical words with -oid
a mass of lymphoid tissue in the upper throat behind the nose; usually said in the plural, adenoids
relating to or resembling lymph, or the tissue that makes lymphocytes, as in lymph nodes, thymus, tonsils and spleen
a benign or malignant tumor arising mostly from the lining of the digestive tract
the mastoid process, a bony bump of the temporal bone behind the ear, or relating to it
hyperthyroidism
an overactive thyroid gland that makes too much hormone, speeding up the body's metabolism · In the dictionary
hypothyroidism
an underactive thyroid gland that makes too little hormone, slowing the body's metabolism · In the dictionary
a toxin treated so it is no longer harmful but still makes the body build immunity, used in vaccines such as tetanus
toothlike, as the odontoid process, the peg on the second neck vertebra
In the dictionary
More terms built with it
Terms in our life science dictionary that list -oid among their word parts.
Sources
Checked against
Written for biofideX in plain words, after checking these references:
- MedlinePlus: Appendix A: Word Parts and What They Mean
- Suffixes – Medical Terminology: An Interactive Approach
- -OID Definition & Meaning - Merriam-Webster
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Endings that make nouns and adjectives
-oid is one of 14 parts in this lesson. Learn them together, then take real words apart.
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