| Singular | Plural | |
|---|---|---|
| Nominativ | armillom, armillum | armilla, armillaeque |
| Genitiv | armilli | armillorum, armillum |
| Dativ | armillo | armillis, armillisque |
| Akkusativ | armillum | armilla, armillaeque |
| Ablativ | armillo | armillisque, armillis |
| Vokativ | armillum | armilla, armillaeque |