rectangular prism; cuboid; rectangular solid
Mathematical term for a solid figure with six rectangular faces; all angles are right angles. In everyday contexts, 直方体 is the standard word, while 立方体 is used specifically for a cube.
The volume of a rectangular prism is found by multiplying length, width, and height.
この箱は直方体の形をしています。
This box is in the shape of a rectangular solid.