Cross sectional

cross-section

[kraws-sek-shuhn, kros-]
adjective
1.
Also, cross-sectional. of or pertaining to a cross section.
verb (used with object)
2.
to make or divide into a cross section.

Origin:
1875–80

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Etymonline
Word Origin & History

cross-section
also cross section, 1835, from cross (adj.) + section. Fig. sense of "representative sample" is from 1903.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
cross section  
In particle physics, an expression of the probability of the occurrence of an event, typically the scattering of subatomic particles, over a given area.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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