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Subterranean vs Subsurface - What's the difference?

subterranean | subsurface |

As adjectives the difference between subterranean and subsurface

is that subterranean is below ground, under the earth, underground while subsurface is below the surface.

As a noun subsurface is

something that is below the layer that is on the surface.

subterranean

English

Adjective

(en adjective)
  • below ground, under the earth, underground

    • Synonyms

    * subterraneous, subterrene, underground

    Related terms

    * terranean

    subsurface

    English

    Noun

    (en noun)
  • Something that is below the layer that is on the surface.
    • Before we could lay the flooring we had to lay a subsurface under it to keep it flat and supoort it.
  • (countable, mathematics) A surface which is a submanifold of another surface.

    • Adjective

    (-)
  • below the surface
    • variations in subsurface conditions
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