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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The second is a vehicle plate integrated into the underside of the Cayenne EV.—
Sujita Sinha,
Interesting Engineering,
5 Sep. 2025
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Clasp the underside of your thighs with both hands, hinge back, and lift your feet until your lower legs are parallel to the floor.—
Health Editorial Team,
Health,
28 Aug. 2025
Noun
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But the name on the bottom of the letter didn’t belong to a law firm.—
Duaa Eldeib,
ProPublica,
10 Sep. 2025
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The Marlins scored three runs in the bottom of the ninth.—
Steve Gorten,
Miami Herald,
10 Sep. 2025
Cite this Entry
“Underpart.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underpart. Accessed 14 Sep. 2025.
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