spherocytosis
C2CEFR level
93/100Rarity: very rare
TechnicalRegister
The presence of spherical, hyperchromic red cells lacking central pallor, seen in hereditary membrane defects and immune haemolysis.
Hereditary spherocytosis was confirmed by a positive osmotic fragility test.
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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