tortoise shell bracket
nounEtymology Calque from Japanese 亀(きっ)甲(こう)括(かっ)弧(こ) (kikkōkakko, literally “tortoise shell bracket”), due to their resemblance to the shell of a tortoise. By surface analysis, tortoise shell + bracket.
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Media, Publishing, Typography Either of a pair of symbols,〔 〕, sometimes used in Japanese to enclose comments in quoted text.