What does coeliac mean?
'Coeliac' is primarily an adjective describing something connected to the abdomen, though in modern usage it almost always refers to coeliac disease: an autoimmune condition in which eating gluten — a protein found in wheat, barley, and rye — damages the lining of the small intestine and impairs nutrient absorption. People with the condition must follow a strict gluten-free diet, sometimes for life, and are often referred to simply as 'coeliacs'. The spelling 'coeliac' prevails in British English, while 'celiac' is the American variant. Though the term derives from an ancient Greek word for the belly, its modern medical sense dates only from the late nineteenth century, when doctors first linked gluten to intestinal damage. Today the word carries no stigma; it appears routinely on food packaging, restaurant menus, and medical records, reflecting how mainstream gluten-free living has become.
Affected by or relating to coeliac disease, an autoimmune disorder in which gluten damages the small intestine.
"He keeps a separate toaster at home because he is strictly coeliac."
Of or relating to the abdominal cavity (chiefly in older or technical anatomical usage).
"The coeliac arteries branch from the aorta to supply the abdominal organs."
This original anatomical sense survives mainly in specialist medical texts such as references to the 'coeliac trunk' or 'coeliac plexus'.
A person who has coeliac disease.
"The menu helpfully marks every dish that is safe for coeliacs."
Used only when 'coeliac' functions as a noun referring to people with the condition; the adjectival form has no plural.
"The support group meets monthly and welcomes newly diagnosed coeliacs."
The word 'coeliac' literally traces back to the ancient Greek word for 'belly' — making it one of medicine's oldest anatomical terms, coined long before anyone knew what caused it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of coeliac
'Coeliac' comes from the ancient Greek 'koiliakos', meaning 'of the belly', itself derived from 'koilia' ('abdomen'). Latin adopted it as 'coeliacus', and English borrowed the term around the early seventeenth century in its original anatomical sense of 'relating to the abdomen'. It shares this Greek root with scientific terms such as 'coelom', the body cavity of many animals. Its specific association with the gluten-related intestinal disorder was established in the late nineteenth century by physicians studying chronic digestive illness.
How coeliac is actually used
In British English the spelling is 'coeliac'; American English uses 'celiac'. The adjective is by far the dominant form in modern usage, usually appearing in phrases like 'coeliac disease', while the noun 'a coeliac' is common in everyday speech among those affected.
Easily confused with coeliac
Colic refers to severe abdominal pain (as in infants), whereas coeliac describes the autoimmune gut disorder triggered by gluten.