noun
iteration mark; repetition symbol
A symbol used in Japanese writing to indicate that the preceding character is repeated, such as 々, ゝ, or ヽ.
See also: 繰り返し符号
「人々」の「々」は繰り返し記号です。
The 々 in 人々 is an iteration mark.
縦書きでは、繰り返し記号として「ゝ」や「ヽ」が使われることがあります。
In vertical writing, ゝ and ヽ are sometimes used as repetition symbols.
Compound of 繰り返し (repetition) + 記号 (symbol). The term is descriptive and transparent.