underpart

American  

[uhn-der-pahrt] / ˈʌn dərˌpɑrt /

noun

1. the lower part or side.

   The underpart of the plane's fuselage scraped the treetops.

2. an auxiliary or secondary part or role.

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Etymology

Origin of underpart

First recorded in 1655–65; under- + part

Example Sentences

It was a male painted bunting, a bird known for its kaleidoscope of colors — blue head, red underparts, and green back.

From Seattle Times

It was a male painted bunting, a bird known for its kaleidoscope of colors — blue heads, red underparts, and green backs.

From Washington Post

The Taliabu leaf warbler, which has been scientifically named after a former Indonesian environment minister, is most notable for its entirely lemon underparts.

From The Guardian

An inspection through binoculars of the lone peregrine falcon revealed the grayish underparts of the common cassini, and not the rarer pallid morph.

From New York Times

Adult peregrine falcons sport a coat of blue-gray feathers with barred white underparts.

From National Geographic