From trāiciō (“to transfer, cause to go across”) (past participle stem trāiect-) + -tōrium (suffix forming nouns for tools and instruments).
trāiectōrium n (genitive trāiectōriī or trāiectōrī); second declension
Second-declension noun (neuter).
singular | plural | |
---|---|---|
nominative | trāiectōrium | trāiectōria |
genitive | trāiectōriī trāiectōrī1 |
trāiectōriōrum |
dative | trāiectōriō | trāiectōriīs |
accusative | trāiectōrium | trāiectōria |
ablative | trāiectōriō | trāiectōriīs |
vocative | trāiectōrium | trāiectōria |
1Found in older Latin (until the Augustan Age).