as in underside
the side or part facing downward from something
painted the undersurface of the plane blue
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Recent Examples of undersurface
Pale green eggs are laid in clusters near the food source with each egg suspended at the end of slender silken threads attached to the undersurface of a leaf.
—
Rita Perwich, San Diego Union-Tribune, 1 July 2023
Scientists observed a beetle walking upside-down on the undersurface of a pool of water.
—New York Times, 26 July 2021
The spots enlarge and are mirrored on the undersurface of the leaf with a white downy growth.
—The Editors Of Organic Life, Good Housekeeping, 21 July 2015
Rita Perwich, San Diego Union-Tribune, 1 July 2023
Scientists observed a beetle walking upside-down on the undersurface of a pool of water.
—New York Times, 26 July 2021
The spots enlarge and are mirrored on the undersurface of the leaf with a white downy growth.
—The Editors Of Organic Life, Good Housekeeping, 21 July 2015
Recent Examples of Synonyms for undersurface
Noun
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In the center is a large, red stop button, and beneath it on the underside of the crossbar is a magnetic safety key that can be clipped to your clothing.—
Craig Rawlins-Wilson,
PC Magazine,
25 Mar. 2026
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Amid all the admiring, even nostalgic, books and films commemorating America’s revolutionary beginnings in the lead-up to our country’s 250th birthday, Ellis’ book examines the underside of that time, specifically the failure to end slavery, and the failure to avoid Indian removal.—
The Know,
Denver Post,
22 Mar. 2026
Noun
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But dating back even further to Monday’s home opener against the Twins, the bottom of the Royals’ order reached base safely in 12 straight plate appearances.—
Sam McDowell,
Kansas City Star,
2 Apr. 2026
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The Blackhawks scored three runs in the bottom of the sixth, however, to grab the lead for good.—
Paul Johnson,
Chicago Tribune,
2 Apr. 2026
Cite this Entry
“Undersurface.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undersurface. Accessed 2 Apr. 2026.
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