What does tonsillitis mean?
Tonsillitis is inflammation of the tonsils, the pair of lymphoid tissues at the back of the throat. It is most often caused by a viral or bacterial infection and may produce a sore throat, fever, painful swallowing, swollen neck lymph nodes, and sometimes a whitish coating on the tonsils. The word is used in both medical and everyday contexts: a clinician may discuss recurrent or streptococcal tonsillitis, while a parent may simply say that a child has “tonsillitis.” Most cases resolve with rest, fluids, and appropriate symptom relief, but severe or recurrent cases may require further assessment or treatment. Tonsillitis is not itself another name for a general sore throat, although the two conditions can occur together and are frequently confused in informal conversation. The term combines the Latin name for the tonsils with the medical suffix “-itis,” meaning inflammation, and remains a familiar example of medical vocabulary in ordinary speech.
nounTonsillitis is inflammation of the tonsils, usually caused by a viral or bacterial infection. It commonly produces a sore throat, painful swallowing, fever, and swollen lymph nodes in the neck.
- Inflammation of the tonsils, typically resulting from infection and commonly accompanied by throat pain, fever, and difficulty swallowing.
"She missed school after developing tonsillitis."
"The doctor diagnosed him with tonsillitis and prescribed rest and fluids."
"Her recurring tonsillitis made swallowing difficult during the winter."
The plural is generally unchanged, though tonsillites is also occasionally used. In everyday usage, tonsillitis is commonly treated as a noncount noun.
"The clinic provides information about recurrent tonsillitis."
The Greek-derived medical suffix “-itis” appears in tonsillitis and signals its central meaning: inflammation.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does tonsillitis come from?
English borrowed tonsillitis in the 18th century from the Latin tonsillae, the plural form of tonsilla, together with the Greek-derived medical suffix -itis, meaning inflammation. The Latin tonsilla is generally connected with tons, an old term for the throat or a part of the throat. Related English words include tonsil, tonsillar, tonsillectomy, and tonsillotomy, all referring to the tonsils or operations involving them.
Related word forms
How tonsillitis is actually used
The word is standard in medical and general usage. It usually names the condition rather than an individual episode, although plural forms occur in formal and dictionary usage.