undersurface

[ uhn-der-sur-fis ]
/ ˈʌn dərˌsɜr fɪs /

noun

underside; bottom surface.

adjective

submerged; under the surface, as of water, earth, etc.: the undersurface speed of a submarine.

Origin of undersurface

First recorded in 1725–35; under- + surface

Example sentences from the Web for undersurface