he·​mo·​sid·​er·​o·​sis ˌhē-mō-​ˌsi-d​ə-​ˈrō-​səs How to pronounce hemosiderosis (audio)
: the excessive deposition of hemosiderin in bodily tissues (as of the liver, spleen, or lungs) that typically results from bleeding, the breakdown of red blood cells, or repeated transfusions and is usually not accompanied by tissue damage
With pulmonary hemosiderosis, iron escapes and deposits occur in lung cells from a bleeding there.Paul G. Donohue
She also developed pancytopenia and required repeated transfusions that resulted in hemosiderosis.Ellen Sidransky et al.

Word History


hemosider(in) + -osis

First Known Use

1896, in the meaning defined above

Time Traveler
The first known use of hemosiderosis was in 1896

Dictionary Entries Near hemosiderosis

Cite this Entry

“Hemosiderosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hemosiderosis. Accessed 18 Apr. 2024.

Medical Definition


variants or chiefly British haemosiderosis
plural hemosideroses -ˌsēz How to pronounce hemosiderosis (audio)
: excessive deposition of hemosiderin in bodily tissues as a result of the breakdown of red blood cells compare hemochromatosis
hemosiderotic adjective
or chiefly British haemosiderotic
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