symbol

/ˈsɪmbəl/

an arbitrary sign (written or printed) that has acquired a conventional significance

中文释义：符号；象征

The dove is a symbol of peace in many cultures.

鸽子在许多文化中是和平的象征。

In mathematics, the symbol 'π' represents the ratio of a circle's circumference to its diameter.

在数学中，符号 'π' 代表圆的周长与直径之比。