What does arteritis mean?
Arteritis is the medical term for inflammation of an artery or arteries. When arterial walls become inflamed, they may narrow, weaken, or be damaged, restricting blood flow to the tissues they supply. In modern medicine the word almost always appears as part of a named condition: giant cell arteritis (also called temporal arteritis), which affects older adults and can threaten eyesight, and Takayasu arteritis, which targets the aorta and its large branches, often in younger patients. Both belong to the broader family of vasculitides — diseases involving inflamed blood vessels. Because untreated arteritis can cause stroke, aneurysm, or permanent vision loss, prompt diagnosis and treatment with anti-inflammatory drugs such as corticosteroids are critical. Though unfamiliar to most laypeople, the word matters greatly to anyone navigating a diagnosis involving inflamed arteries.
nounInflammation of the walls of an artery or arteries, typically causing damage, narrowing, or weakening of the affected vessels.
- Medical: inflammation of one or more arteries, occurring in specific forms such as giant cell (temporal) arteritis and Takayasu arteritis.
"The biopsy revealed giant cell arteritis, prompting immediate treatment with high-dose corticosteroids to protect her vision."
"Untreated temporal arteritis can lead to irreversible vision loss within days."
"Takayasu arteritis, sometimes called 'pulseless disease', primarily affects the aorta and its major branches in younger patients."
Rare and technical; follows the Greek-style plural pattern also seen with 'arthritides'. Most clinical writing treats arteritis as uncountable or refers to individual named types instead.
"Large-vessel arteritides include giant cell arteritis and Takayasu arteritis."
Giant cell arteritis is a leading cause of sudden blindness in older adults — which is why doctors start steroids on suspicion alone, before any test result comes back.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of arteritis
Arteritis derives from Greek roots via New Latin medical coinage: 'artēria', meaning artery (a windpipe-like vessel, from Greek 'artēriā'), combined with the Greek suffix '-itis', denoting inflammation. The '-itis' suffix was systematized in early modern European medicine to name inflammatory diseases, so arteritis entered English alongside siblings like arthritis and bronchitis. Its cognates share the same arterial root, including 'arterial', 'arteriole', and 'arteriosclerosis'.
How arteritis is actually used
Strictly a medical term, used almost exclusively in clinical and academic contexts rather than everyday speech. It usually appears modified by a specifier naming the type — 'giant cell', 'temporal', or 'Takayasu' — since 'arteritis' alone rarely names a complete diagnosis. The plural form is rare because the condition is typically discussed per patient or per vessel type rather than counted.
Easily confused with arteritis
Arthritis is inflammation of the joints, whereas arteritis is inflammation of the arteries; the words differ by a single letter but denote entirely different conditions.
Arteriosclerosis is the hardening and thickening of artery walls (often age-related or due to plaque), while arteritis is active inflammation of those walls.