comedone
C2CEFR level
88/100Rarity: very rare
TechnicalRegister
A plug of keratin and sebum lodged within a dilated pilosebaceous follicle, the primary lesion of acne.
Numerous open and closed comedones over the forehead marked the earliest stage of her acne.
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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