subsurface
/S AH1 B S ER0 F AH0 S/noun
- 1
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 support it.”
- 2
A surface which is a submanifold of another surface.
adjective
- 1
Below the surface
“variations in subsurface conditions”
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