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.
The calorie content in Roma Tomato varies based on the size of the tomato and also on its method of preparation. A medium sized raw Roma tomato contains around 35 calories out of which only 9 calories come from fat. An equal sized raw Roma tomato contains 7 grams of carbohydrates, 6 grams sugar, 1.4 grams of dietary fiber, 1 gram protein and 5 mg sodium. The Vitamin C content in a raw Roma Tomato is quite high and it also contains a good amount of Vitamin A. It also contains small traces of iron and calcium.