aqueous humour
C1CEFR level
80/100Rarity: very rare
TechnicalRegister
The clear fluid in the front chamber of the eye that nourishes the cornea and lens and maintains intraocular pressure.
Obstruction of aqueous humour drainage at the trabecular meshwork raises the intraocular pressure.
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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