drain
A1CEFR level
10/100Rarity: common
TechnicalRegister
A tube left in a wound or cavity to allow fluid, blood, or pus to escape and be measured after surgery.
The abdominal drain was removed once output had fallen below thirty millilitres a day.
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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