a state of poor nutrition; can result from insufficient or excessive or unbalanced diet or from inability to absorb foods
malnutrition详细解释
mal.nu.tri.tion n.（名词）Poor nutrition because of an insufficient or poorly balanced diet or faulty digestion or utilization of foods.营养不良：由于食量不足或食物结构不平衡、消化不良或食物吸收不良而引起的营养匮乏
