kryo-|kraɪəʊ|another spelling of cryo- combining form of Gr. κρύος frost, in various scientific terms: see cryogen, cryohydrate, cryoconite, cryolite, cryoscopy, etc. kryˈometer[Gr. µέτρον measure], a thermometer for measuring very low temperatures.1877Raymond Statist. Mines & Mining 427 Kryolite from spathic iron.1882Brannt tr.Thausung's Malt & Beer 38 Alcohol and sulphuret of carbon are used as thermometrical substances for measuring very low temperatures... Thermometers for such low temperatures are called Kryometers [cold meters].