undersurface

/ˌʌndərˈsʌrfəs/

Definitions of undersurface

1. noun

   the lower side of anything
   synonyms: bottom, underside

   types:

   base

   a flat bottom on which something is intended to sit

   bilge

   where the sides of the vessel curve in to form the bottom

   heel

   the bottom of a shoe or boot; the back part of a shoe or boot that touches the ground and provides elevation

   sole

   the underside of footwear or a golf club

   underbelly

   lower side

   bilges

   in a vessel with two hulls, an enclosed area between the frames at each side

   Cuban heel

   a broad heel of medium height on women's shoes

   French heel

   a fairly high narrow heel on women's shoes

   half sole

   shoe sole extending from the shank to the toe

   innersole, insole

   the inner sole of a shoe or boot where the foot rests

   outsole

   the outer sole of a shoe or boot that is the bottom of the shoe and makes contact with the ground

   spike, spike heel, stiletto heel

   a very high narrow heel on women's shoes

   stacked heel

   a heel made of many layers of leather

   wedge, wedge heel

   a heel that is an extension of the sole of the shoe

   wineglass heel

   a heel on a woman's shoe in the shape of a wineglass

   type of:

   face, side

   a surface forming part of the outside of an object