| Answer | Crossword Clue |
|---|---|
| DAY | 24-hour period |
| SOLARDAY | 24-hour period, in astronomy |
| DIEL | Of a 24-hour period |
| DIEL | Involving a 24-hour period, in biology |
| diel | a 24-hour period, in relation to animal behaviour patterns |
| nychthemeral | (Greek) of or relating to a nychthemeron or 24-hour period |
| diel | of or pertaining to a 24-hour period, esp. a regular daily cycle, as of the physiology or behavior of an organism |
