celcius
UK[ˈselsiəs]US[ˈselsiəs]
adj
Relating to a temperature scale where water freezes at 0 degrees and boils at 100 degrees under standard conditions.
Etymology
The word 'Celsius' is an eponym, derived from the surname of the Swedish astronomer Anders Celsius (1701–1744). Celsius originally proposed a temperature scale in 1742 where 0 represented the boiling point of water and 100 the freezing point, which was later reversed to its modern form. The adoption of his name for the scale followed the common practice of honoring scientific innovators by attaching their names to their contributions. The spelling 'Celcius' is a common misspelling of the correct 'Celsius', which has become frequent enough to be recognized as a variant.
Analysis
The word is a proper name adopted as a single lexical unit. It is not productively formed from separable English morphemes.
Examples
The weather forecast predicts a high of 25 degrees Celcius tomorrow.
Most countries use the Celcius scale for everyday temperature measurements.
Set the oven to 180 degrees Celcius for baking.