Its botanical name, Citrus maxima, means "the biggest citrus". In English, the word "pomelo" (also spelt pummelo, pumelo, pomello, pommelo) has become the more common name, although "pomelo" has historically been used for grapefruit. One pomelo fruit is packed with several days' worth of the recommended daily intake of vitamin C, a powerful antioxidant and immune system booster. It's also rich in several other vitamins, minerals, and nutrients, including copper, fiber, and potassium.