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cross section

noun

1
a
: a cutting or piece of something cut off at right angles to an axis
also : a representation of such a cutting
2
: a measure of the probability of an encounter between particles such as will result in a specified effect (such as scattering or capture)
3
: a composite representation typifying the constituents of a thing in their relations
cross-section transitive verb
cross-sectional adjective

Examples of cross section in a Sentence

a detailed cross section of the human brain The drawing showed the human brain in cross section. The class surveyed a cross section of the student body. The people in our neighborhood are a representative cross section of American society.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Offering more video, photos and articles sourced from outsiders and company employees alike to reach the widest cross section of the internet as possible. Jackie Charniga, USA Today, 8 Nov. 2025 Indeed, the conversation inspired a scene in his 2015 film, Taxi, which featured Panahi as a driver interacting with a cross section of Iranian society. Arash Azizi, The Atlantic, 22 Oct. 2025 If so, under what rules of engagement? Leaders in the industry are working to ensure that future thanks to a cross section of professionals. Osayi Endolyn, Bon Appetit Magazine, 22 Oct. 2025 Coach had to keep innovating by offering exciting products, anchored in bags, with aesthetics and prices that appealed to a larger cross section of consumers. Big Think, 14 Oct. 2025 See All Example Sentences for cross section

Word History

First Known Use

1835, in the meaning defined at sense 1a

Time Traveler
The first known use of cross section was in 1835

Browse Nearby Words

Cite this Entry

“Cross section.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cross%20section. Accessed 29 Nov. 2025.

Kids Definition

cross section

noun
1
a
: a cutting made across something (as a log or an apple)
b
: a representation of a cross section
a cross section of a blood vessel
2
: a number of persons or things selected from a group to stand for the whole
cross-sectional
ˈkrȯs-ˈsek-sh(ə-)nəl
adjective

Medical Definition

cross section

noun
: a cutting or piece of something cut off at right angles to an axis
also : a representation of such a cutting
cross-sectional adjective

More from Merriam-Webster on cross section

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