Deficiency

Overview
A deficiency is a lack of something.


 * In mathematics, a deficient number is a number n for which σ(n) < 2n.
 * In medicine there are a variety of nutrient deficiencies:
 * Avitaminosis is a deficiency of vitamins.
 * Boron deficiency (medicine)
 * Chromium deficiency
 * Iron deficiency (medicine)
 * Iodine deficiency
 * Magnesium deficiency (medicine)
 * In genetics, a genetic deletion is also called a deficiency.

Mangel Deficiëntie Mangel