synechia
C2CEFR level
95/100Rarity: very rare
TechnicalRegister
An adhesion binding the iris to adjacent structures, either the lens or the cornea.
Recurrent uveitis had formed posterior synechia, tethering the pupil margin to the anterior lens capsule.
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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