chord
noun [ C ] uk/kɔːd/ us/kɔːrd/
(MUSIC)
（音乐的）和弦，和音
three or more musical notes played at the same time
She strummed a few chords on her guitar. 她在吉他上弹了几个和弦。
a C major chord C大调和弦
(MATHS)
弦(连接圆上任意两点的线段)
a straight line that joins the ends of an arc (= a curved line that forms part of a circle)