Βάκτρα
From LSJ
οὐκ ἔστι σιγᾶν αἰσχρόν, ἀλλ' εἰκῆ λαλεῖν → keeping silence is not shameful; speaking at random is (Menander)
English (LSJ)
τά,
A Balkh, Hdt.9.113, Arist.Mir.833b14, Str.11.8.9: the people were Βάκτριοι, Hdt.3.102; or Βακτριανοί, Str.l.c.; cf. Βακτριανή ἡ, Id.11.9.2:—the Bactrian camels were famous, Arist. HA498b8.
Greek (Liddell-Scott)
Βάκτρα: τά, πρωτεύουσα τῆς ἐν Ἀσίᾳ Βακτριανῆς, παρὰ νεωτέροις Balkh, Ἀριστ. π. θαυμασ. 46, Στράβ. 514, κ. ἀλλ.· - οἱ κάτοικοι Βάκτριοι αὐτόθι 513· ἢ Βακτριανοὶ αὐτόθι 514· - περίφημοι ἦσαν αἱ Βακτριαναὶ κάμηλοι, Ἀριστ. Ἱ. Ζ. 2. 1, 24.