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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His first goal for the club arrived the following week in emphatic fashion, turning away from pressure neatly before cannoning this left-footed shot off the underside of the bar.—
Thom Harris,
New York Times,
7 Apr. 2026
-
Instead, females appear with golden-green coloring with a white underside, according to All About Birds.—
Lucia Cheng,
Des Moines Register,
2 Apr. 2026
Noun
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Isolated by its beautiful, rugged mountains, West Virginia sits entirely within Appalachia and has long been listed at the bottom of a laundry list of failings, including poor health and a lack of education.—
ABC News,
ABC News,
9 Apr. 2026
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Dangerous shore break can throw a swimmer or surfer head first into the bottom causing neck and back injuries.—
NC Weather Bot,
Charlotte Observer,
8 Apr. 2026
Cite this Entry
“Underpart.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underpart. Accessed 11 Apr. 2026.
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