That stratum of the surface of the soil which is filled with the roots of grass, or any portion of that surface; turf; sward.

To cover with sod; to turf.

Turf, or the surface of the ground that can be carved into bricks and used for building.

Squares or strips of turfgrass with the adhering soil; can be used in vegetative planting.

sediment oxygen demand. the rate that dissolved oxygen from the water column is consumed by chemical and biological processes at or near the riverbed, such as respiration by benthic organisms, degradation of organic matter and chemical oxidation

super oxide dismutase an enzyme which plays a key part in converting harmful free radicals into inert non-damaging molecules, superoxide dismutase is a potent anti-oxidant.

Superoxide Dismutase. An antioxidant enzyme which helps protect cells from free-radical damage.

Sediment oxygen demand; biochemical oxygen demand of microorganisms living in sediments.

(SOHD) n. Secret. In the realm of interpretation, sod refers to the most “hidden” or “secret” level of a given pasuk (e.g., Gematria or Pictographic meanings).

the mystical dimension of Torah study

The level of Torah interpretation that plumbs its Kabbalistic or mystical depths.