IN MATH: 1. n. a solid having congruent and parallel polygons (called its bases) as two of its sides and in which the remaining sides share edges with each of these bases. EX. Prisms are named by the shape of their bases: triangular prism, rectangular prism, etc.

IN ENGLISH: 1. n. a triangular-prism-shaped piece of glass or other transparent material used to disperse light into a spectrum. EX. I want a prism for Christmas.

APPLICATION: See list 160.

1. What's the volume of a triangular prism having a base with an area of 25 square units and having a height of 9 units?

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