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
-
Stengel’s shot, off the underside of the crossbar in the match’s dying moments, put an end to the Current’s season.—
Daniel Sperry,
Kansas City Star,
9 Nov. 2025
-
Golden mussels clog the thruster and decorate the underside of his dinghies.—
CalMatters,
Mercury News,
6 Nov. 2025
Noun
-
Thank you from the bottom of my heart, thank you so much.—
Madison E. Goldberg,
PEOPLE,
8 Jan. 2026
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Butter crocks are designed with an air-tight seal and a separate space to store water at the bottom that prevents air from reaching the butter, which can lead to spoiling.—
Alicia Geigel,
Southern Living,
7 Jan. 2026
Cite this Entry
“Underpart.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underpart. Accessed 12 Jan. 2026.
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