as in underside
the side or part facing downward from something
the bird's underparts were white
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Recent Examples of underpart
Calliope hummers have glossy green on the back and crown with white underparts.
—
Joan Morris, The Mercury News, 26 July 2019
The adult brown pelican has gray underparts with brown hues, black-brown belly, yellow head and dark brown neck, silver-gray back and wings, with black feathers at the tips.
—Ernie Cowan, San Diego Union-Tribune, 13 June 2019
Joan Morris, The Mercury News, 26 July 2019
The adult brown pelican has gray underparts with brown hues, black-brown belly, yellow head and dark brown neck, silver-gray back and wings, with black feathers at the tips.
—Ernie Cowan, San Diego Union-Tribune, 13 June 2019
Recent Examples of Synonyms for underpart
Noun
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As VideoCardz reports, this reduces material usage, making the boards cheaper to produce, and also has the nice-to-have benefit of making the underside of the motherboards far less sharp, hopefully leading to fewer nicked fingers.—
Jon Martindale,
PC Magazine,
27 Apr. 2026
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At ground level, the building feels almost improbably large, much of its underside shaded.—
Ariana Marsh,
Vogue,
21 Apr. 2026
Noun
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Be sure to use the slider at the bottom of the page if their answers don’t fit the screen on your device.—
Mark Dee
April 29,
Idaho Statesman,
29 Apr. 2026
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Take the time to scan from top to bottom, and don’t be afraid to gently move items aside.—
Elizabeth Fogarty,
Better Homes & Gardens,
29 Apr. 2026
Cite this Entry
“Underpart.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underpart. Accessed 1 May. 2026.
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