Английский разговорный словарь (основной) - supercool
Supercool
supercool
ˈsju:pəku:l v. & adj. --v. Chem. 1 tr. cool (a liquid) belowits freezing-point without solidification or crystallization. 2 intr. (of a liquid) be cooled in thisway. --adj. sl. very cool, relaxed, fine, etc.