| Answer | Crossword Clue |
|---|---|
| thio | containing sulfur, esp. in place of oxygen |
| sulfurousnesses | of, pertaining to, or containing sulfur, esp. in the tetravalent state |
| oligotrophic | (esp. of a lake) Relatively low in plant nutrients and containing abundant oxygen in the deeper parts |
| thiosulfates | A salt containing the anion S2O32?, i.e., a sulfate with one oxygen atom replaced by sulfur |
| thiosulfate | A salt containing the anion S2O32?, i.e., a sulfate with one oxygen atom replaced by sulfur |
| perchloric | containing more oxygen than chloric acid, esp applied to an oily explosive acid, HClO4 |
