Princeton's WordNet(4.60 / 5 votes)Rate this definition: 1  operation(noun) the state of being in effect or being operative. 2  operation(noun) a business especially one run on a large scale. 3  operation(noun) a planned activity involving many people performing various actions.
Tomatoes are a nutrient-dense food, meaning they are jam-packed with nutrients, but don't have a lot of calories. Lipids, carbs and protein are the three types of macronutrients your body breaks down for energy. The primary macronutrient in tomatoes is carbohydrates, although they do have trace amounts of fat and protein.
A full 1-cup serving of grape tomatoes, which is about five or six pieces, contains 25 to 30 calories. Nearly all of the calories come from carbohydrates, but grape tomatoes also have trace amounts of fat and protein.These two macronutrients contribute less than 1 calorie per tomato.early all of the calories come from carbohydrates, but grape tomatoes also have trace amounts of fat and protein. These two macronutrients contribute less than 1 calorie per tomato.