1) Mineral deficiency 
An abnormally low level of serum iron. ... Origin: sidero-+ G. Penia, poverty ... (05 Mar 2000) ... 
(sid″әr-o-pe´ne-ә) iron deficiency. adj., siderope´nic., adj.
Type: Term Pronunciation: sid′ĕr-ō-pē′nē-ă Definitions: 1. An abnormally low level of serum iron.
[n] - a deficiency of iron
sideropenia Deficiency of iron in the system, usually caused by blood loss, low dietary levels of iron, or a disease condition that inhibits iron uptake.
noun a deficiency of iron; results from inadequate iron in the diet or from hemorrhage