1. Plural of prismoid; solid geometric figures with two parallel polygonal bases and lateral faces that are trapezoids or triangles.
Usage: technical; mathematics; geometry

Examples

• The engineer used prismoids to approximate the volume of irregular earthwork sections.
• In surveying, prismoids are useful for calculating the volumes of embankments and cuts.
• The formula for prismoids helps estimate material quantities in construction projects.
• Geometry students learned to identify prismoids as solids with parallel bases and trapezoidal sides.
• The surveyor applied the prismoidal rule to determine the volume of the excavated prismoids.