Déclinaison / Conjugueur latin
| SINGULIER |
| Nom. | tetrachordos |
| Gen. | tetrachordi |
| Dat. | tetrachordo |
| Acc. | tetrachordon |
| Abl. | tetrachordo |
| Voc. | tetrachorde |
| PLURIEL |
| Nom. | tetrachordi |
| Gen. | tetrachordōrum |
| Dat. | tetrachordis |
| Acc. | tetrachordos |
| Abl. | tetrachordis |
| Voc. | tetrachordi |
| SINGULIER |
| Nom. | tetrachordă |
| Gen. | tetrachordae |
| Dat. | tetrachordae |
| Acc. | tetrachordam |
| Abl. | tetrachordā |
| Voc. | tetrachordă |
| PLURIEL |
| Nom. | tetrachordae |
| Gen. | tetrachordārum |
| Dat. | tetrachordis |
| Acc. | tetrachordas |
| Abl. | tetrachordis |
| Voc. | tetrachordae |
| SINGULIER |
| Nom. | tetrachordon |
| Gen. | tetrachordi |
| Dat. | tetrachordo |
| Acc. | tetrachordon |
| Abl. | tetrachordo |
| Voc. | tetrachordon |
| PLURIEL |
| Nom. | tetrachorda |
| Gen. | tetrachordōrum |
| Dat. | tetrachordis |
| Acc. | tetrachorda |
| Abl. | tetrachordis | |