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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Diamondback Moth: Small brown caterpillars just 0.5 inches prior to pupation in loosely woven cocoons on the underside of brassica leaves.—
Mary Marlowe Leverette,
Southern Living,
14 Aug. 2025
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Bulky footwear can impede mobility when your heel is on the bottom of the kayak, and can force a tight fit when placing your feet on the underside of the deck.—
Clay Abney,
Travel + Leisure,
14 Aug. 2025
Noun
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Screenshots from a July 28 Instagram video of a cat found hiding in the bottom of a couch after a buyer purchased it off Facebook Marketplace.—
Liz O'Connell,
MSNBC Newsweek,
9 Aug. 2025
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Here’s the reality about predicting market bottoms – surprises can occur.—
Trefis Team,
Forbes.com,
8 Aug. 2025
Cite this Entry
“Underpart.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underpart. Accessed 20 Aug. 2025.
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