n. a disease which is caused by a deficiency in thiamine (vitamin B1). It can either manifest as neurological symptoms or as cardiovascular abnormalities. The most common symptoms include loss of muscle function and difficulty in walking, accompanied by increased heart rate and shortness of breath. See Wernicke's encephalopathy.

BERIBERI: "Beriberi is a condition described as a lack of vitamin B1 (thiamine) in the body."