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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The amphipods feed on algae that grows on the underside of the ice, so less ice means less food to fuel the whales for their journey.—
Erika I. Ritchie,
Oc Register,
5 Mar. 2026
-
Clean the underside of your table the same way.—
Karen Brewer Grossman,
Southern Living,
5 Mar. 2026
Noun
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Venezuela cut its deficit in half in the bottom of the first on a Willson Contreras RBI single against Marlins ace Sandy Alcantara that plated Maikel Garcia, who hit an infield single and moved to second on a Luis Arraez walk.—
Jordan McPherson,
Miami Herald,
12 Mar. 2026
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Cardiff finished bottom of the Premier League in the 2013-14 campaign, before Caulker again suffered relegation from the top flight with Queens Park Rangers the following season.—
Jay Harris,
New York Times,
12 Mar. 2026
Cite this Entry
“Undersurface.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undersurface. Accessed 13 Mar. 2026.
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