Wiktionary
supercold
a. Very cold; having an extreme cold.
Usage examples of "supercold".
The splash of the supercold aerosol made a drink taste of nothing but cold without the dilution of ice.
Our vacuum-testing chamber now had a tank of liquid nitrogen, three hundred and some degrees below zero, and a pump to move the supercold stuff through a grid of pipes inside the tank.
The fuel system was surprisingly complicated, elaborate, a system of huge pipes, fountains of supercold liquid propellants cascading into combustion chambers as hot as the sun.