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
-
And in San Clemente, the pier was closed until Wednesday afternoon as waves reached its underside and appeared to break off some wood and wash it to shore.—
Laylan Connelly,
Oc Register,
11 June 2026
-
Start spraying at the bottom of the plant's stalk, focusing on the undersides of the leaves where pests often hide.—
SJ McShane,
Martha Stewart,
11 June 2026
Noun
-
Top-to-bottom, just a great effort against a really good team.—
Brendan Connelly,
Boston Herald,
11 June 2026
-
The Angels had a chance to get an insurance run in the bottom of the seventh, when Oswald Peraza led off with a hit and stole second and third.—
Jeff Fletcher,
Oc Register,
11 June 2026
Cite this Entry
“Underpart.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underpart. Accessed 15 Jun. 2026.
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