Learn how to say Cross Section correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word cross section:
(mathematics) a plane surface formed by cutting across a solid, esp perpendicular to its longest axis
a section cut off in this way
the act of cutting anything in this way
a random selection or sample, esp one regarded as representative ⇒ a cross section of the public
(surveying) a vertical section of a line of ground at right angles to a survey line
(physics) a measure of the probability that a collision process will result in a particular reaction. It is expressed by the effective area that one participant presents as a target for the other