The term 'Dietary Abbr.' refers to abbreviations used in the dietary field. The two most common abbreviations are CAL, which stands for Calories, and RDA, which stands for Recommended Dietary Allowance. Calories are a unit of energy that is used to measure the amount of energy in food, while the Recommended Dietary Allowance is the average daily nutrient intake level that is considered sufficient to meet the requirements of 97-98% of healthy individuals.