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

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

From New York Times

When the undersurface of the first tablet was revealed, Dr. White got chills.

From New York Times

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 Literature

The small marks and scars on the undersurface and variation in the trailing edge can be used for individual identification.

From New York Times