|1.||med Compare avitaminosis any condition, such as pellagra, beriberi, or scurvy, produced by a lack of vitamins or other essential substances|
|2.||botany any disease caused by lack of essential minerals|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a fool or simpleton; ninny.|
deficiency disease n.
A disease that is caused by a dietary deficiency of specific nutrients, especially a vitamin or mineral, possibly stemming from insufficient intake, digestion, absorption, or utilization of a nutrient. Also called insufficiency disease.