gliosis
C2CEFR level
95/100Rarity: very rare
TechnicalRegister
A reactive proliferation of glial cells forming scar tissue after injury to the central nervous system.
The MRI reported an area of gliosis marking the site of the old infarct.
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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