The first digit of the foot, commonly known as the big toe, has a few synonyms that people may not be familiar with. One term is the hallux, which is Latin for "big toe." Another word is the great toe, which is more commonly used in medical settings. The largest toe of the foot is also referred to as the first toe, as it is the first of the five toes from the inside to the outside of the foot. Additionally, some people may call their big toe the thumb toe, as it functions similarly to the thumb on the hand.