siglum
/ˈsɪgləm/noun
(pl. sigla /-lə/)
- a letter or symbol which stands for a word or name, especially to denote a particular manuscript or edition of a text（尤指用于表示某一文稿的手稿或版本而使用的代表词或名字的）字母（或符号）。
词源
early 18th cent.: from late Latin sigla (plural)， perhaps from singula, neuter plural of singulus 'single'.