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
-
Float kits and ski kits can also be fitted to the aircraft’s underside to enable landings on water and snowy terrain.—
Chris Young,
Interesting Engineering,
3 Feb. 2026
-
Place chicken, skin sides down, in skillet; cook, undisturbed, until deeply browned on underside, 5 to 8 minutes.—
Kimberly Holland,
Southern Living,
2 Feb. 2026
Noun
-
Spanxsmooth Swim styles will include string bikini tops and bottoms, a bandeau bikini top, and a scoop-neck one-piece.—
Lisa Lockwood,
Footwear News,
11 Feb. 2026
-
Neodymium is a rare earth, one of the minerals near the bottom of the periodic table that are crucial for everyday life.—
Chris Isidore,
CNN Money,
11 Feb. 2026
Cite this Entry
“Undersurface.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undersurface. Accessed 13 Feb. 2026.
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