callus
B2CEFR level
68/100Rarity: rare
TechnicalRegister
The bridging tissue, initially cartilaginous and later ossified, that forms at a fracture site during healing.
Abundant callus visible at six weeks confirmed that the fracture was uniting satisfactorily.
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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