enamel
A2CEFR level
25/100Rarity: fairly common
TechnicalRegister
The highly mineralised, acellular outer covering of the tooth crown and the hardest tissue in the body.
Fluoride promotes remineralisation of early enamel lesions before cavitation occurs.
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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