[n] surface layer of ground containing a matt of grass and grass roots
[n] (British) "the poor sod couldn't even buy a drink"
[n] someone who engages in anal copulation (especially a male who engages in anal copulation with another male)
[n] an enzyme that catalyzes the conversion of superoxide into hydrogen peroxide and oxygen; "oxygen free radicals are normally removed in our bodies by the superoxide dismutase enzymes"
[v] cover with sod