Calorie
A calorie was a measurement of the energy derived from foods. 

In 2365, so as not to embarrass Worf, Doctor Katherine Pulaski chalked up his fainting spell to him taking part in a Klingon ritual involving fasting, saying he had overexerted himself beyond what his caloric intake could handle. In reality, he was suffering from rop'ngor, a Klingon childhood disease. ()

In 2370, Jadzia Dax devoured a piece of Andorian tuber root Benjamin Sisko had left on his plate, claiming she would need the extra calories to keep up with the hardworking Gideon Seyetik. ()

In an alternate 2379, Neelix offered Kes Jiballian fudge cake at her ninth birthday party, while acknowledging that she should have been watching her calories. ()

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de: Kalorie
Medical measurements
Energy