lingual
C2CEFR level
80/100Rarity: very rare
TechnicalRegister
Relating to the tongue or the tooth surface facing the tongue.
Calculus tends to build up on the lingual side of the lower front teeth.
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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