Anorexia nervosa
In 1868, he had delivered an address to the British Medical Association at Oxford in which he referred to a "peculiar form of disease occurring mostly in young women, and characterised by extreme emaciation". Gull observed that the cause of the condition could not be determined, but that cases seemed mainly to occur in young women between the ages of sixteen and twenty-three. In this address, Gull referred to the condition as "Apepsia hysterica", but subsequently amended this to "Anorexia hysterica" and then to "Anorexia nervosa".