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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Pascal Siakam had 29 points in his return after sitting out three games because of a left wrist sprain to lead Indiana, but the Pacers lost their seventh in a row and fell to the bottom of the Eastern Conference with a 15-47 record.—
Los Angeles Times,
Los Angeles Times,
5 Mar. 2026
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Styling relaxed-fit bottoms with a polished heel is the easiest—and comfiest—way to look model-off-duty chic.—
Jordan Julian,
InStyle,
4 Mar. 2026
Cite this Entry
“Undersurface.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undersurface. Accessed 6 Mar. 2026.
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