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.
E.g. one average tomato has about 3 grams of carbs. One whole cauliflower head weighs a lot more though, perhaps ten times more, and may thus contain about ten times 4 grams, i.e. 40 grams of carbs. Note the clear difference between above ground and below-ground vegetables.