(=ops=), =opis=, f., _power_, _help_; pl. =opēs, um=, _wealth_, _resources_. =optimus=, see =bonus=. =optō, āre, āvī, ātus=, _to hope_, _desire_. =ad--adoptō, āre, āvī, ātus=, _to adopt_. =opulentus, a, um= [=ops=], adj., _rich_, _wealthy_. =opus, operis=, n., _work_, _business_, _need_; _fortification_. =ōrātor, ōris= [=ōrō=], m., _an orator_, _ambassador_. =orbis, is=, m., _circle_; =orbis terrae= or =terrārum=, _the world_. =orbitās, ātis= [=orbus=, _destitute_], f., _bereavement_, _orphanage_. =Orchadēs, um=, pl. f., a group of islands north of Scotland, now Orkney Islands. =ōrdinārius, a, um= [=ōrdinō=], adj., _of order_, _usual_, _regular_, _ordinary_. =ōrdinō, āre, āvī, ātus= [=ōrdō=], _to arrange_, _regulate_. =ōrdō, inis=, f., _an order_, _rank_, _row_. =Orestēs, is=, m., _Cn. Aufidius Orestes_, consul 73 B.C. =Oriēns, entis= [=orior=], m. (sc. =sōl=), _the rising sun_, _the East_, _the Orient_. =orīgō, inis= [=orior=], f., _an origin_, _source_, _pedigree_. =orior, īrī, ortus sum=, _to rise_, _begin_, _spring from_. =oriundus, a, um= [=orior=], adj., _descended_, _sprung from_, _originating_, _born_. =ōrnāmentum, ī= [=ōrnō=, _to fit out_], n., _a preparation_; _decoration_, _ornament_, _jewel_. =ōrō, āre, āvī, ātus= [=ōs=, _mouth_], _to pray_, _beg_, _entreat_. =ad--adōrō, āre, āvī, ātus=, _to supplicate_; _worship_, _reverence_. =Orōdēs, is=, m., a king of the Parthians, conquered by Pompey. =os, ossis=, n., _a bone_. =Osdroēna, ae=, f., _Osroēnē_, a district in the west of Mesopotamia. =Osdroēnī, ōrum=, pl. m., _the inhabitants of Osdroēna_. =ostendō=, see =tendō=. =ōstiātim=, adv., _from door to door_, _from house to house_. =ōstium, ī= [=ōs=, _mouth_], m., _the mouth of a river_. =Otācilius, ī=, m., _(T.) Otācilius Crassus_, consul 263 B.C. =Othō, ōnis=, m., _(M. Salvius) Othō_, Roman emperor from January 15 to April 16, 69 A.D. =ōtium, ī=, n., _leisure_; _ease_, _idleness_; _rest_, _peace_. =ovō, āre, --, --=, _to exult_, _rejoice_; _receive an ovation_, _triumph_. P. =P.=, abbreviation of the praenomen Publius. =pācō, āre, āvī, ātus= [=pāx=], _to pacify_, _make peaceful_. =Pacorus, ī=, m., son of Orodes I., king of Parthia. =Paelīgnī, ōrum=, pl. m., a Sabine people dwelling in central Italy. =paene=, adv., _almost_, _nearly_. =Palaeopharsālus, ī=, f., a city in Thessaly where Caesar defeated Pompey 48 B.C. It is generally written Pharsalus. =Palaestīna, ae=, f., _Palestine_. =palam=, adv., _openly_, _publicly_. =Palātīnus, ī= (sc. =mōns=), adj., _the Palatine Hill_. =Palātium, ī=, n., _the Palatine Hill_; _the imperial palace_, which was on the hill. =pallium, ī=, n., _a Grecian cloak_, _mantle_. =palūs, ūdis=, f., _a marsh_, _fen_. =Pamphȳlia, ae=, f., a division of Asia Minor. =Pannonia, ae=, f., one of the most important provinces of Rome, lying between the Danube and the Alps. =Pannonicus, a, um=, adj., _pertaining to Pannonia_.