Triangular is a three-sided shape, with three angles and three sides. The term can be used to describe a variety of objects, from mathematical shapes to physical objects. The crossword solutions for the term triangular are DELTOID (7 letters), DELTAIC (7 letters), and DELTOIDAL (9 letters). DELTOID refers to a triangle-shaped muscle in the shoulder, while DELTAIC and DELTOIDAL both refer to a triangular-shaped landform, such as a river delta.