An older or variant spelling of 'calorie,' a unit of energy commonly used to measure food energy.
From Latin 'calor' (heat). An earlier spelling variant of 'calorie' used in 19th-century scientific literature.
The word 'calory' is mostly obsolete now, but when you see old nutrition books mention 'calories in food,' they're talking about the same heat energy scientists called 'calory' back then!
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