| Term: | Degree-day |
| Definition: | A derived unit of measurement used to express the departure of the mean temperature for a day from a given reference (or base) temperature. (C or F) |
| Term: | Degree-day |
| Definition: | A unit of measurement to express the departure of the mean temperature for a day from a given References (or base) temperature. The Freezing Index and the Thawing Index are expressed in degree-days with respect to a References temperature of 0C (32F); units: degree-day Celsius or degree-day Fahrenheit. |