You may think you know the difference between a fruit and a vegetable. Fruits are sweet; veggies are savory, right? Bzzt. Botanically speaking, many plant foods we call vegetables — even cereal grains — are actually fruits. Vegetable is a culinary term for the stem, leaf, or root of a plant, says Almuth Tschunko, PhD, a professor of biology at Marietta College in Marietta, Ohio. Fruits, on the other hand, develop from the flower and contain one or more seeds. For example, in scientific terms, a carrot is a root, whereas each kernel of corn is an individual fruit. Likewise, a sunflower “seed” is simply a dried fruit. The exception: The fruit of the tomato plant was legally classified as a vegetable in the U.S. in 1893, when the Supreme Court ruled that because they were eaten in entrées, tomatoes should be subject to the same tariffs as vegetables.