1a byword for sth a person or a thing that is a typical or well-known example of a particular quality 体现某种特质的人或物: A limousine is a byword for luxury.高级轿车是奢侈的代名词。
2 (especially US 尤为美) a word or phrase that is often used 口头禅
c²
/si: ||; si/abbr
1C Celsius; centigrade （温度）摄氏: Water freezes at 0°C.水在摄氏0度结冰。
2C coulomb(s) 库伦
3 (before dates) about; approximately （用于日期前）大约: c 1770大约1770年