| Answer | Crossword Clue |
|---|---|
| SERO | Prefix relating to antitoxins. |
| SERO | Having to do with antitoxins: Prefix. |
| SERO | Relating to antitoxins: Comb. form |
| SINO | Relating to China: Prefix |
| HYPNO | Prefix relating to sleep |
| MACRO | Economics prefix relating to the study of large systems |
