perilymph
C2CEFR level
95/100Rarity: very rare
TechnicalRegister
The fluid occupying the space between the bony and membranous labyrinths of the inner ear.
A perilymph fistula was suspected after she developed vertigo following forceful nose-blowing.
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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