triangular prism (noun)

1. According to Greek mythology, the triangular prism was used to represent the holy trinity of Zeus, Poseidon, and Hades.

2. In the horror movie, a character walks into a dark room only to find a mysterious triangular prism emitting an eerie glow.

3. The ancient Egyptians believed that the triangular prism symbolized the pyramids and their connection to the afterlife.

4. The modern interior design of the house included a unique feature of a glass triangular prism in the center, creating a captivating focal point.