From ὀρχέομαι (orkhéomai, “to dance”) + -τρᾰ (-tra, “a suffix used to form instrument nouns (pl.)”).
ὀρχήστρᾱ • (orkhḗstrā) f (genitive ὀρχήστρᾱς); first declension
| Case / # | Singular | Dual | Plural | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominative | ἡ ὀρχήστρᾱ hē orkhḗstrā |
τὼ ὀρχήστρᾱ tṑ orkhḗstrā |
αἱ ὀρχῆστραι hai orkhêstrai | ||||||||||
| Genitive | τῆς ὀρχήστρᾱς tês orkhḗstrās |
τοῖν ὀρχήστραιν toîn orkhḗstrain |
τῶν ὀρχηστρῶν tôn orkhēstrôn | ||||||||||
| Dative | τῇ ὀρχήστρᾳ têi orkhḗstrāi |
τοῖν ὀρχήστραιν toîn orkhḗstrain |
ταῖς ὀρχήστραις taîs orkhḗstrais | ||||||||||
| Accusative | τὴν ὀρχήστρᾱν tḕn orkhḗstrān |
τὼ ὀρχήστρᾱ tṑ orkhḗstrā |
τᾱ̀ς ὀρχήστρᾱς tā̀s orkhḗstrās | ||||||||||
| Vocative | ὀρχήστρᾱ orkhḗstrā |
ὀρχήστρᾱ orkhḗstrā |
ὀρχῆστραι orkhêstrai | ||||||||||
| Notes: |
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