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
-
The soft flannel top and plush faux shearling fleece underside provide excellent heat retention for serious coziness.—
Jacquelyn McGilvray,
PEOPLE,
22 Jan. 2026
-
To inspect for pests, look on the undersides of leaves, on leaf joints, and in areas of new growth.—
Leanne Potts,
Better Homes & Gardens,
20 Jan. 2026
Noun
-
The distressed tabletop exudes vintage charm, while the bottom slatted shelf prevents the piece from appearing too bulky.—
Jacqueline Tempera,
PEOPLE,
22 Jan. 2026
-
The Galaxy also want to forget about 2025 when the club finished near the bottom of the Western Conference.—
Damian Calhoun,
Daily News,
22 Jan. 2026
Cite this Entry
“Undersurface.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undersurface. Accessed 24 Jan. 2026.
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