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
-
Float kits and ski kits can also be fitted to the aircraft’s underside to enable landings on water and snowy terrain.—
Chris Young,
Interesting Engineering,
3 Feb. 2026
-
Place chicken, skin sides down, in skillet; cook, undisturbed, until deeply browned on underside, 5 to 8 minutes.—
Kimberly Holland,
Southern Living,
2 Feb. 2026
Noun
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Warming up meals in a toaster oven likewise results in uneven heating, with the top portion getting dried or burnt and the middle part ending up lukewarm if the element is located on the top – the reverse is true if the element is on the bottom.—
New Atlas,
New Atlas,
4 Feb. 2026
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This petite, chic travel jewelry case keeps necklaces untangled, prevents rings from drifting to the bottom of her carry-on, and secures earring posts from bending or breaking.—
Annie Blackman,
InStyle,
4 Feb. 2026
Cite this Entry
“Underpart.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underpart. Accessed 12 Feb. 2026.
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