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.
Non-starchy vegetables have 1 to 16 grams of carbohydrates in a 1-cup serving, according to the USDA Nutrient Data Laboratory. This list includes green beans, broccoli, carrots, celery, beets, spinach, cucumbers, bell peppers and tomatoes. All types of lettuce only have about 2 grams in a 2-cup serving. The starchy vegetables -- corn and potatoes -- have more carbohydrates. One cup of raw corn has 27 grams, 1 medium potato has 26 grams and a medium sweet potato has 33 grams of carbohydrates.