expiry date
B1CEFR level
20/100Rarity: fairly common
TechnicalRegister
The date after which a medicine should not be used because its quality or potency can no longer be guaranteed.
During the date check we pulled several boxes whose expiry date had passed from the front of the shelf.
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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