| Answer | Crossword Clue |
|---|---|
| oxygenic | pertaining to oxygen (a gaseous element) |
| chlorous | pertaining to chlorine (a gaseous element, also CHLORIN) |
| oxygens | OXYGEN, a gaseous element |
| oxidic | pertaining to oxide (a compound of oxygen) |
| ozonous | pertaining to ozone (a form of oxygen) |
| hypoxic | pertaining to hypoxia (a deficiency of oxygen in body tissue) |
