Related Clues:
- Doughnut, mathematically
- It breaks light up into rainbow's colours
- Solid body with six equal square sides
- Device that breaks light into colours of rainbow
- Hexahedron with six plane faces
- Solid body with six equal square faces
- Transparent 3 sided object that seperates light into colours
- Transparent 3-sided object that separates light into colours
- Three-sided object that separates light into colours
- Solid with six equal square sides
- Triangular piece of glass, optical device
- Triangular, glass optical device
- Triangular piece of glass to deviate a beam
- Regular hexahedron
- Glass triangle that separates light into colours