Domaći
| cirka | about | |
| cirka | circa | |
| cirkadijani ritam | circadian rhythm | |
| cirkadijanski | circadian | |
| cirkadijurni ritam | circadian rhythms | |
| cirkadijurni ritmovi | circadian rhythms | |
| cirkadijurni stres | circadian stress | |
| cirkalunalni | circaannual | |
| cirkanualni ritam | circaannual rhythm |