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 amphipods feed on algae that grows on the underside of the ice, so less ice means less food to fuel the whales for their journey.—
Erika I. Ritchie,
Oc Register,
5 Mar. 2026
-
Clean the underside of your table the same way.—
Karen Brewer Grossman,
Southern Living,
5 Mar. 2026
Noun
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Pascal Siakam had 29 points in his return after sitting out three games because of a left wrist sprain to lead Indiana, but the Pacers lost their seventh in a row and fell to the bottom of the Eastern Conference with a 15-47 record.—
Los Angeles Times,
Los Angeles Times,
5 Mar. 2026
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Styling relaxed-fit bottoms with a polished heel is the easiest—and comfiest—way to look model-off-duty chic.—
Jordan Julian,
InStyle,
4 Mar. 2026
Cite this Entry
“Underpart.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underpart. Accessed 8 Mar. 2026.
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