amicus curiae
C2CEFR level
85/100Rarity: very rare
TechnicalRegister
A non-party who, with the court's leave, files argument to assist on a point of broad importance.
Two trade bodies applied to appear as amicus curiae on the data-protection question.
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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