haemosiderin
C2CEFR level
95/100Rarity: very rare
TechnicalRegister
An insoluble aggregate of iron and protein deposited in tissues as a store of iron, particularly when it is in excess.
Repeated transfusions led to haemosiderin deposition in the myocardium and endocrine glands.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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