Orography, or-og′ra-fi, n. the description of mountains—also Orol′ogy.—n. Orog′eny, the origin and formation of mountains.—adjs. Orograph′ic, -al; Orolog′ical, of or pertaining to orology.—ns. Orol′ogist, one versed in orology; Orom′eter, a mountain-barometer. [Gr. oros, a mountain.]
Oroide, ō′rō-īd, n. an alloy of copper, tin, and other metals used for watch-cases, cheap jewellery, &c.—Also O′rēide. [Fr. or—L. aurum, gold, Gr. eidos, form.]
Orotund, ō′rō-tund, adj. full, clear, and musical, as speech.—n. full, clear, and musical speech, as when directly from the larynx. [L. os, oris, the mouth, rotundus, round.]
Orphan, or′fan, n. a child bereft of father or mother, or of both.—adj. bereft of parents.—v.t. to bereave of parents.—ns. Or′phanage, the state of being an orphan: a house for orphans; Or′phan-asy′lum; Or′phanhood, Or′phanism; Orphanot′rophy, the supporting of orphans. [Gr. orphanos, akin to L. orbus, bereaved.]
Orpharion, or-fā′ri-on, n. a large lute with six to nine metal strings.—Also Orpheō′reon.
Orphean, or′fē-an, adj. pertaining to Orpheus, a poet who could move inanimate objects by the music of his lyre.—adj. Or′phic, pertaining to Orpheus, or the mysteries connected with the cult of Bacchus.—v.i. Or′phise.—n. Or′phism.
Orphrey, or′fri, n. gold or other rich embroidery attached to vestments, esp. chasuble and cope. [Fr. orfroi—or—L. aurum, gold, Fr. fraise, fringe.]
Orpiment, or′pi-ment, n. arsenic trisulphide, giving king's yellow and realgar (red).—ns. Or′pine, Or′pin, a deep-yellow colour: the Sedum Telephium, a popular vulnerary. [Fr.,—L. auripigmentum—aurum, gold, pigmentum, paint.]
Orra, or′a, adj. (Scot.) odd: not matched: left over: doing odd pieces of work: worthless.
Orrery, or′ėr-i, n. an apparatus for illustrating, by balls mounted on rods and moved by clockwork around a centre, the size, positions, motions, &c. of the heavenly bodies. [From Charles Boyle, fourth Earl of Orrery (1676-1731).]