Vegetables are defined by how they grow, and how they taste. The various parts of the plant that can be eaten (defined below) qualify each section of the plant as either a fruit or a vegetable. The overall taste of vegetables is defined by culinary specialists as less sweet, more savory, and served along with the main meal.
According to botanists, fruit is the part of the plant that develops from a flower and contains the plant’s seeds. The remaining parts of the plant (root, stem, etc.) are then considered vegetables. This makes things like avocado, cucumbers, tomatoes, and pumpkins technically fall into the fruit family, plant wise.
Nutritionally speaking, fruits and vegetables are very similar, containing antioxidants, high fiber, and loads of vitamins and minerals. The only variable being that most fruits have more calories in one serving than vegetables do. The exception to this are dense, starchy vegetables like potatoes and beets. Taste wise, fruits tend to be sweeter and tart, and often are served as a dessert or snack.