A clementine (Citrus ×clementina) is a hybrid between a Mediterranean Citrus ×deliciosa and a sweet orange, so named in 1902. The exterior is a deep orange colour with a smooth, glossy appearance. Clementines can be separated into 7 to 14 segments. Similarly to tangerines, they tend to be easy to peel. They are almost always seedless when grown commercially (without cross-pollination), and therefore are sometimes known as seedless tangerines. The clementine is also occasionally referred to as the Moroccan clementine. They are typically juicy and sweet, with less acid than oranges. Their oils, like other citrus fruits, contain mostly limonene as well as myrcene, linalool, α-pinene and many complex aromatics.