subsurface

/ˌsʌbˈsʌrfəs/
IPA guide

Definitions of subsurface
  1. adjective
    beneath the surface
    “subsurface materials of the moon”
    synonyms:
    belowground, underground
    under the level of the ground
    submarine, undersea
    beneath the surface of the sea
    submerged, submersed, underwater
    beneath the surface of the water
    subterranean, subterraneous
    being or operating under the surface of the earth
    see moresee less
    antonyms:
    surface
    on the surface
    overhead
    located or originating from above
    aboveground
    on or above the surface of the ground
    grade-constructed
    constructed at ground level
    opencast, opencut
    (of mines and mining) worked from the exposed surface
    show more antonyms...
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