三相點 [－－点]

Jyutping saam1 soeng3 dim2
Pinyin sān xiàng diǎn

Definitions (CC-CEDICT)
  1. triple point (thermodynamics)
Definitions (Wiktionary)
  1. noun
    triple point (the unique temperature and pressure at which the solid, liquid and gas phases of a substance are all in equilibrium)