What is Cross-section ?
Cross-section is (noun) 1. a diagram made to show the inside of something, as if it had been cut through The picture shows a cross-section of the Channel Tunnel. Diagram 4 is a cross-section of a diesel engine. 2. a typical group of people The team consulted a cross-section of the public in the shopping centre.
source: Easier English, Student Dictionary Upper Intermediate Level