| English | eng-000 |
| zero circle | |
| 普通话 | cmn-000 | 基圆 |
| 普通话 | cmn-000 | 零周 |
| English | eng-000 | base circle |
| English | eng-000 | fundamental circle |
| English | eng-000 | generating circle |
| English | eng-000 | ground circle |
| English | eng-000 | primary circle |
| English | eng-000 | rolling circle |
| русский | rus-000 | нулевой цикл |