(Botany)abnormal reduction or loss of the normal green coloration of leaves of plants, typically caused by iron deficiency in lime-rich soils, or by disease or lack of light (植)缺绿症;退绿
(Medicine)anaemia caused by iron deficiency, especially in adolescent girls, causing a pale, faintly greenish complexion. It was a common diagnosis in the 19th century (医)萎黄病,绿色贫血