出典:Wiktionary
Third declension.
| Case | Singular | Plural |
|---|---|---|
| Nominative | retrōgradātiō | retrōgradātiōnēs |
| Genitive | retrōgradātiōnis | retrōgradātiōnum |
| Dative | retrōgradātiōnī | retrōgradātiōnibus |
| Accusative | retrōgradātiōnem | retrōgradātiōnēs |
| Ablative | retrōgradātiōne | retrōgradātiōnibus |
| Vocative | retrōgradātiō | retrōgradātiōnēs |