skaala, mille üks kraad (1 °C) on algupäraselt sajandik osa jää sulamistemperatuuri (võetud skaala nullpunktiks) ja vee keemistemperatuuri vahest, for instance, according to the Celsius temperature scale, one degree Celsius (1 °C) was originally one hundredth of the difference of the boiling temperature of water and melting temperature of ice (taken as the zero of the scale)