Water retention, formally known as edema, is a symptom of a number of conditions including dehydration, constipation, hormonal changes, excess sodium in the diet, heart conditions and kidney problems.
dross. n. 1. Waste or impure matter: discarded the dross after recycling the wood pulp. 2. The scum that forms on the surface of molten metal as a result of oxidation. 3. Worthless, commonplace, or trivial matter: He was wide-awake and his mind worked clearly, purged of all dross (Vladimir Nabokov).
science fiction. 1  droid-A robot in science fiction, it is a shortening of android. 2  death ray-Was a staple of (pulp) science fiction in the mid-20th century. 3  time warp-A concept that arose in the 1950s and originally applied to science fiction.