undersurface

American  

[uhn-der-sur-fis] / ˈʌn dərˌsɜr fɪs /

noun

1. underside; bottom surface.

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adjective

1. submerged; under the surface, as of water, earth, etc..

   the undersurface speed of a submarine.

Etymology

Origin of undersurface

First recorded in 1725–35; under- + surface

Example Sentences

From “a sample return we will learn much more about habitable conditions in the undersurface liquid water ocean of the moon,” Coustenis says.

From Science Magazine • Nov. 19, 2021

It skittered along the undersurface of the water as if in a parallel world, the kneeling Dr. Gould beneath him.

From New York Times • Jul. 26, 2021

As the nail is produced by the root, it streams down along the nail bed, which adds material to the undersurface of the nail making it thicker.

From Textbooks • Jan. 1, 2015

"The juxtaposition between the rough undersurface revealed during renovation and the opulence of the decor inspired a mixture of luxuriously embellished fabrics," Wu wrote in his notes.

From Seattle Times • Feb. 11, 2011

The female Tiphia, finding a beetle grub in the soil, injects a paralyzing fluid and attaches a single egg to the undersurface of the grub.

From "Silent Spring" by Rachel Carson