undersurface

The nest was some forty feet from the ground, on the undersurface of a shelf of rock.

He pointed with his antennae to the fluorescent hieroglyphs on the undersurface of the saucer-ship.

The undersurface, originally a bright red, turns brown and runs in every direction into a mass of dark stalactites.

There had been a lot of that at first, in the early days before the transfer to undersurface was complete.

Until our families can come up from undersurface, it's going to be pretty lonesome, but we'll have to manage.

Undersurface whitish-fawn, the hairs sandy at their bases, whiter terminally.