Definition of hemosiderin
: a yellowish-brown, iron-containing, granular pigment that is found within cells (such as macrophages), is composed chiefly of aggregates of ferritin, and is typically associated with bleeding and the breakdown of red blood cells (as in hemolytic anemia)
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Merriam-Webster unabridged
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Time Traveler for hemosiderin
The first known use of hemosiderin was in 1888
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