1. a protein containing 20% iron that is found in the intestines and liver and spleen; it is one of the chief forms in which iron is stored in the body;
WordNet (r) 3.0 (2006):
ferritin
n 1: a protein containing 20% iron that is found in the
intestines and liver and spleen; it is one of the chief
forms in which iron is stored in the body