cross section
- a cutting through something, esp. at a right angle
- a piece so cut off
- a drawing or photograph of a plane surface exposed by such a cutting
- a sample that has enough of each kind in it to show what the whole is like
- Nuclear Physics a measure of the probability that a nuclear reaction will take place, under specified conditions, between two particles or a particle and another target: usually expressed in terms of the effective area a single target presents to the incoming particle
- Surveying a vertical section of the ground surface taken at right angles to a survey line
See cross section in American Heritage Dictionary 4
also cross-sec·tion (krôsˈsĕkˈshən, krŏsˈ-)
nouna. A section formed by a plane cutting through an object, usually at right angles to an axis.
b. A piece so cut or a graphic representation of such a piece.
- Physics A measure of the probability that an encounter between particles will result in the occurrence of a particular atomic or nuclear reaction. Also called collision cross section.
- Statistics A sample meant to be representative of a whole population.
- Informal A variety; a diversity.
Related Forms:
- crossˈ-secˈtion·al (krôsˈsĕkˈshə-nəl, krŏsˈ-) adjective
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