The Collaborative International Dictionary of English v.0.48:

Chlorosis \Chlo*ro"sis\, n. [NL., fr. Gr. chlwro`s light green:
   cf. F. chlorose.]
   1. (Med.) The green sickness; an an[ae]mic disease of young
      women, characterized by a greenish or grayish yellow hue
      of the skin, weakness, palpitation, etc.
      [1913 Webster]

   2. (Bot.) A disease in plants, causing the flowers to turn
      green or the leaves to lose their normal green color.
      [1913 Webster]

WordNet (r) 3.0 (2006):

chlorosis
    n 1: iron deficiency anemia in young women; characterized by
         weakness and menstrual disturbances and a green color to
         the skin [syn: chlorosis, greensickness]