Your teachers in school were right: the tomato is a fruit. If that confused you back then — or if it still confuses you now — there's a good reason. Despite being technically a fruit, tomatoes are savory, which means we eat them as if they were vegetables. So don't feel bad if you're still munching on tomatoes in salads and sandwiches — you're doing it right.

In very simple terms: Fruits have seeds. The main difference between fruits and vegetables has nothing to do with what they taste like; it's all about what part of the plant they come from. Fruits come from the ovary of a flowering plant, which must be pollinated and fertilized before they can grow. Vegetables, on the other hand, are all the other edible parts of a plant, like roots, stems, and leaves.

To further complicate things, a food can be both a fruit and a vegetable at the same time — sort of. It's the difference between the botanical and culinary definition, which means that certain foods are considered by chefs to be vegetables even though science classifies them as fruits. Tomatoes are one of these; because tomatoes are savory, you won't ever see them in a sweet pie or fruit salads, but they'll always be a staple in ratatouille.

To throw another spanner in the works, tomatoes are legally classified as a vegetable. In 1893, the U.S. Supreme Court ruled that tomatoes should be taxed as vegetables rather than fruit, meaning that imported tomatoes are subject to a higher tax rate. In the ruling, the court acknowledged that a tomato is technically a fruit, but decided to use the layman definition of fruits and vegetables instead.

You may have already known that a tomato is a fruit. But did you know that it's not the only fruit commonly classified as a vegetable? Peppers of all kinds — including jalapeños — are fruits, too. So are cucumbers, eggplant, olives, corn, and even string beans! All gourds fall into the botanical category of fruit — that goes for pumpkins, squash, and zucchini.

Legumes are the fruit or seed of plants in the Fabaceae family. Which means — you guessed it — they're a fruit. A lot of common legumes, like peas, beans, lentils, and chickpeas, are technically seeds, while the pods they come in are the fruit. Another surprising fact? Peanuts aren't really nuts; they're legumes, which makes them a fruit, too.

Strawberries, raspberries, blackberries, and mulberries are delicious — but, despite their names, none of them are berries. Scientifically speaking, berries are produced from the ovary of a single flower, which makes all those fruits aggregate or multiple fruits rather than true berries. What fruits really are berries, then? Cucumbers, eggplants, zucchinis, peppers, bananas, and grapes are all berries. Avocados are single-seeded berries, while pumpkins and watermelons are a type of giant berry.

If a pumpkin is a fruit, what about sweet potatoes? Not so fast — even though they taste sweeter than a lot of fruits on this list, sweet potatoes and yams are techinaclly vegetables. In fact, a lot of foods commonly used in desserts and other sweet dishes are vegetables rather than fruits, including beets, carrots, turnips, and rhubarb.

Nutritionally, not so much. Fruits and vegetables are both an essential part of any balanced diet. They're both low in fat and sodium and high in vitamins, minerals, antioxidants, and fiber. Most fruits are higher in sugar and calories, but these natural sugars are still a lot healthier than the added sweeteners found in other snacks and desserts. Different kinds of fruits and vegetables have their own unique health benefits, too; citrus fruits are high in vitamin C, while tubers are a great source of B vitamins, and leafy greens like spinach and kale contain an antioxidant called lutein, which protects the body from free radicals. At the end of the day, just remember that fruits and vegetables are both good for you — even if you can't always tell them apart.