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Synonyms

underside

American  
[uhn-der-sahyd] / ˈʌn dərˌsaɪd /

noun

undersides plural
  1. an under or lower side.


underside British  
/ ˈʌndəˌsaɪd /

noun

  1. the bottom or lower surface

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of underside

First recorded in 1670–80; under- + side 1

Vocabulary lists containing underside

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The brain tumour, he said, was like "a monster with tentacles spreading across the underside of my brain the width of a baseball".

From BBC May 13, 2026

To investigate the process, the team combined a highly detailed map of the underside of the Fimbulisen Ice Shelf with a high resolution computer model of the ocean cavity beneath it.

From Science Daily May 10, 2026

They often keep the underside of each slab as it is instead of flattening the bottoms.

From Los Angeles Times Apr. 8, 2026

Max Beier almost put Dortmund ahead in the first half but his effort was deflected by Denis Vavro's last-ditch block onto the underside of the bar.

From Barron's Feb. 7, 2026

Then he pointed to the underside of my arm.

From "The Bell Jar" by Sylvia Plath

Analysis has shown Punk and Emo had smooth undersides, indicating they likely lived on the seabed.

From BBC Jan. 10, 2025

Aescape has heated “hands,” which look like giant pads with touch points on their undersides.

From Los Angeles Times Dec. 3, 2024

Rignot said the project helped him and his colleagues develop a better understanding of the behavior of seawater on undersides of Thwaites Glacier.

From Science Daily May 20, 2024

Certain species, like the pythons, have specialized muscles that connect their ribs directly to their skin, allowing them to use just the skin on their undersides to push against the ground and move forward.

From Slate Mar. 8, 2024

It had rained heavily, and though the rain had stopped, wind still blew, and the leaves of the trees fluttered and revealed their pale undersides.

From "Messenger" by Lois Lowry

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