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

Wikipedia Word definitions in Wikipedia
Ferritin is a universal intracellular protein that stores iron and releases it in a controlled fashion. The protein is produced by almost all living organisms, including algae, bacteria, higher plants, and animals. In humans, it acts as a buffer against ...

WordNet Word definitions in WordNet
n. 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

Wiktionary Word definitions in Wiktionary
n. (context protein English) Any of a family of iron-carrying globular protein complexes consisting of 24 protein subunits.