切點 [－点]

Jyutping cit3 dim2
Pinyin qiē diǎn

Definitions (CC-CEDICT)
  1. contact (math.)
Definitions (Wiktionary)
  1. noun
    point of contact
Examples (粵典–words.hk)
  1. Cantonese
    圆形半径同切点上嘅切线互相垂直。
    圓形半徑同切點上嘅切線互相垂直。
    jyun4 jing4 bun3 ging3 tung4 cit3 dim2 soeng6 ge3 cit3 sin3 wu6 soeng1 seoi4 zik6.
    • The radius of a circle to the point of tangency is perpendicular to the tangent line.