turf, sod, sward, greensward -- (surface layer of ground containing a mat of grass and grass roots)
superoxide dismutase, SOD -- (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")
sodomite, sodomist, sod, bugger -- (someone who engages in anal copulation (especially a male who engages in anal copulation with another male))
sod -- (an informal British term for a youth or man; "the poor sod couldn't even buy a drink")
(Sound)
