Cross-section (noun)

1. A view of an object as if it had been cut through, typically at right angles to an axis.
2. A representation of an object as if it were cut through along a plane.

Origin:

The term cross-section is formed by combining the two words "cross" and "section", and it refers to a cut made through an object perpendicular to its longest axis. the word cross-section is first recorded in the late 18th century.

Examples:

1. The cross-section of a tree trunk shows the rings.
2. This cross-section of a human brain is used for educational purposes.
3. The engineers studied the cross-section of the bridge's foundation.
4. The geologist examined the rock's cross-section to determine its age.
5. The cross-section of the airplane wing shows the internal structure.