A disease caused by deficiency of niacin or tryptophan (or by a defect in the metabolic conversion of tryptophan to niacin)

• Itching to see Indian city with unlimited enchantments
• May be caused by malnutrition or alcoholism or other nutritional impairments
• Characterized by gastrointestinal disturbances and erythema and nervous or mental disorders
• Dietary disease
• Vegetable eating wholly brought about King George's disease
• Disease from vitamin deficiency: everyone returned to tuck into confection of grape

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
chronic disease caused by dietary deficiency and characterized by skin eruptions, 1811, a hybrid formed from Latin pellis "skin" (see film (n.)) + Greek agra "a catching, seizure," related to agrein "to take, seize." But OED suggests it might be originally ...

Wiktionary Word definitions in Wiktionary
n. (context pathology English) A disease, with skin lesions and mental confusion, primarily caused by a niacin deficiency.

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Another form of mental disorder, pellagra , was associated clinically with diarrhoea and dermatitis. ▪ Colitis, which is histologically similar to ulcerative colitis, has also been described in association with pellagra . ▪ Eat ...

WordNet Word definitions in WordNet
n. a disease caused by deficiency of niacin or tryptophan (or by a defect in the metabolic conversion of tryptophan to niacin); characterized by gastrointestinal disturbances and erythema and nervous or mental disorders; may be caused by malnutrition or ...