radian的词源

英文词源

radian (n.)youdaoicibaDictYouDict
"angle subtended at the center of a circle by an arc equal in length to the radius," 1879, from radius.

中文词源

radian:弧度

rad-,半径,-an,名词后缀。引申词义弧度。

该词的英语词源请访问找单词词源英文版:radian 词源,radian 含义。