Trigone refers to a triangular-shaped area that is found in various parts of the human body. There are several synonyms for the word trigone, including triangle, delta, triquetra, and triad. The term triangle is commonly used to describe a three-sided shape, while delta is often used in reference to a river delta or the Greek letter D. Triquetra is a more specialized term that describes a Celtic knot that is often used in religious and spiritual art. Finally, the term triad is often used to describe a group of three related things, such as the three primary colors of light. Overall, there are many different synonyms for the versatile and important word trigone.