noun
pellagra
puh-LAH-gruh/pəˈlɑːɡrə/
A disease caused by a lack of niacin.
A severe lack of niacin in the diet can cause pellagra.

Etymology
The Italian disease name may come from “rough skin,” describing a characteristic symptom. Another proposed analysis combines Latin “skin” with Greek “seizure,” so the name’s exact formation remains uncertain.
In context
but you don't get pellagra from eating corn unless corn is the only thing that you're eating and you're not getting vitamin B from any other source
More examples
- Doctors treat pellagra with niacin supplements and a balanced diet.
- Without treatment, pellagra can damage the skin and nervous system.
- The doctor suspects pellagra because of the patient's diet and symptoms.