Vein Flower is a type of flower that has a unique pattern of veins on its petals. The veins are usually a darker color than the rest of the petal, creating an interesting contrast. The term 'vein flower' is derived from the fact that the veins resemble those found in human BLOOD vessels. This type of flower is often used in floral arrangements and bouquets, as it adds a unique and eye-catching element to the arrangement.