the world > the earth > structure of the earth > constituent materials > earth or soil > [noun] > sod > as material (3)
A slice of earth with the grass growing upon it, a turf, a sod, such as are used in the north for roofing cottages, forming the edges of thatched…
a turf used in building up a bank of a ditch in the operation of water-tabling.
Sods or turfs as a material for forming or strengthening embankments, etc.