The intersection of a body in 3D space with a plane, or the analog in higher-dimensional space. Cutting an object into slices creates many parallel cross sections. A cross section of 3D space that is parallel to two of the axes is a contour line
An image that shows an object as if cut along a plane, usually at right angles to a main axis.
A section formed by a plane cutting through an object, usually at right angles to an axis.