You searched for: “cryophorus
cryophorous, cryophorus (s) (noun); cryophorouses; cryophoruses (pl)
An instrument demonstrating the freezing of water by its evaporation: Mr. Jones explained to his students that by the use of a cryophorous water could turn into ice by its own evaporation.

A cryophorus is a device t for showing the freezing of water by its own evaporation.