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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Since the underside is steel, its filter is stuck in place using magnetic strips.—
Thomas Soderstrom,
PC Magazine,
4 Oct. 2025
-
Small cottony clusters may appear on branches, in cracks in the bark, on roots, or on the undersides of leaves.—
Karen Brewer Grossman,
Southern Living,
2 Oct. 2025
Noun
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United have a relatively kind baptism to their European campaign on Wednesday, with a home match against Norwegian side Valerenga, who have only been in the competition once before and finished bottom of their group.—
Megan Feringa,
New York Times,
7 Oct. 2025
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The brownie bits at the top and bottom hit different at the end.—
Kimberly Holland,
Southern Living,
7 Oct. 2025
Cite this Entry
“Underpart.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underpart. Accessed 8 Oct. 2025.
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