An orange is a popular citrus fruit, a hybrid of pomelo and mandarin, known for its sweet, juicy pulp and Vitamin C, with common types including navel (great for eating), Valencia (best for juicing), and blood oranges (red flesh). These evergreen fruits offer a bright, tangy-sweet taste and are used fresh, juiced, or in cooking, with their peels also used for oils, while bitter oranges are used for jams and liqueurs.