cryohydric point
Technical term in chemistry: the temperature at which a solution of a salt and water freezes as a whole, forming ice and salt crystals simultaneously.
The cryohydric point is an important concept when studying the freezing-point depression of salt solutions.
Compound of 氷晶 (ice crystal) + 点 (point), likely a calque from English 'cryohydric point' or German 'Kryohydratpunkt'.