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
-
Both tortoises were microchipped and the Egyptian tortoise was said to have a prominent scar on its underside, Indiana State Police said in a press release.—
Meredith Deliso,
ABC News,
28 Oct. 2025
-
Use a magnifying glass, and look on the underside of foliage where mites like to hide.—
Arricca Elin SanSone,
Southern Living,
27 Oct. 2025
Noun
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Her statement-making look featured a sleeveless shirt covered in oversize paillettes that bled into blues on the bottom.—
Skyler Caruso,
PEOPLE,
4 Nov. 2025
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As per usual, her shiny blond ends hugged the bottom of her ears, not a long strand in sight.—
Kaleigh Werner,
Footwear News,
4 Nov. 2025
Cite this Entry
“Undersurface.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undersurface. Accessed 6 Nov. 2025.
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