apex
C1CEFR level
68/100Rarity: rare
TechnicalRegister
The anatomical tip of a tooth root, through which the nerves and blood vessels enter the pulp.
The infection has spread beyond the apex, producing a shadow on the radiograph at the root tip.
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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