ὄργανον. [122] 25, [124] 4, 22. Musical instrument. Lat. instrumentum. So the adjective ὀργανικός (instrumental) in [124] 16, [126] 16.
ὀρθός. [106] 19. Nominative. Lat. rectus (casus): viz. ‘uninflected.’ In [102] 19 ‘primary,’ as opposed to ‘secondary’; in [108] 3 ‘active,’ as opposed to ‘passive.’ In [258] 25 and [262] 5 the meaning is ‘correct’; in [90] 6 perhaps ‘tense’ (see the exx. given in L. & S. under the heading ‘excited’), the opposite of ὕπτιος (supinus).
ὁρίζειν. [132] 22, [166] 1, [234] 21. To define, to limit. Lat. definire.
ὅρος. [182] 13, [200] 25, [210] 5. Standard, condition, boundary. Lat. regula, condicio, finis. With the sense norma et regula in [182] 13 cp. Long. de Subl. xxxii. 1 ὁ γὰρ Δημοσθένης ὅρος καὶ τῶν τοιούτων, Dionys. H. de Demosth. c. 1 ἧς (λέξεως) ὅρος καὶ κανὼν ὁ Θουκυδίδης.
οὐδέτερος. [106] 21. Neuter. Lat. qui neutri generis est. Cp. D.H. p. 198.
οὐρανός. [142] 12, [144] 19, [150] 6, [220] 23. Palate. Lat. palatum. In the margin of R (with reference to [142] 12) there is the note: τὴν ὑπερῴαν φησίν. This sense of οὐρανός is found several times in Aristotle (see Bonitz’ Index), and not (as has sometimes been supposed) for the first time in Dionysius. Cp. the converse caeli palatum in Ennius apud Cic. de Nat. Deor. ii. 18. 48 “sed dum, palato quid sit optimum, iudicat [Epicurus], caeli palatum (ut ait Ennius) non suspexit.”
οὐσία. [98] 8. Substance, essence. Lat. substantia.
ὄχλησις. [132] 17. Annoyance, disgust. Lat. molestia.
ὄψις. [162] 1, 14, [234] 9. Appearance, visage. Lat. vultus, aspectus.