chelation
C2CEFR level
88/100Rarity: very rare
TechnicalRegister
The binding of metal ions by a compound so that they can be safely excreted from the body.
Chelation was commenced to lower the child's dangerously high blood lead concentration.
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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