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Orichalceous

Pertaining to, or resembling, orichalch; having a color or luster like that of brass.

Orichalch

A metallic substance, resembling gold in color, but inferior in value; a mixed metal of the ancients, resembling brass; -- called also aurichalcum, orichalcum, etc.

Oriency

Brightness or strength of color.

Orient

To define the position of, in relation to the orient or east; hence, to ascertain the bearings of.

Oriental

A native or inhabitant of the Orient or some Eastern part of the world; an Asiatic.

Orientality

The quality or state of being oriental or eastern.

Orientalize

to render Oriental; to cause to conform to Oriental manners or conditions.

Orientate

To move or turn toward the east; to veer from the north or south toward the east.

oriented orientated

Adjusted or aligned to surroundings or circumstances; sometimes used in combination; as, to get oriented on one's first day at a new job.

Orientness

The quality or state of being orient or bright; splendor.

Orifice

A mouth or aperture, as of a tube, pipe, etc.; an opening; as, the orifice of an artery or vein; the orifice of a wound.

Origanum Origan

A genus of aromatic labiate plants, including the sweet marjoram (Origanum Marjorana) and the wild marjoram (Origanum vulgare).

Origenism

The opinions of Origen of Alexandria, who lived in the 3d century, one of the most learned of the Greek Fathers. Prominent in his teaching was the doctrine that all created beings, including Satan, will ultimately be saved.

Originally

In the original time, or in an original manner; primarily; from the beginning or origin; not by derivation, or imitation.

Originate

To take first existence; to have origin or beginning; to begin to exist or act; as, the scheme originated with the governor and council.

Originative

Having power, or tending, to originate, or bring into existence; originating.

Orillon

A semicircular projection made at the shoulder of a bastion for the purpose of covering the retired flank, -- found in old fortresses.

Oriole

Any one of various species of Old World singing birds of the family Oriolidae. They are usually conspicuously colored with yellow and black. The European or golden oriole (Oriolus galbula, or Oriolus oriolus) has a very musical flutelike note. In America, any one of several species of the genus Icterus, belonging to the family Icteridae. See Baltimore oriole, and Orchard oriole, under Orchard.

Oriolidae

A natural family of Old World orioles.

Oriolus

The type genus of the Oriolidae.

Orion

A large and bright constellation on the equator, between the stars Aldebaran and Sirius. It contains a remarkable nebula visible to the naked eye.

Oriskany

Designating, or pertaining to, certain beds, chiefly limestone, characteristic of the latest period of the Silurian age.

Orismology

That department of natural history which treats of technical terms; the science of defining technical terms.

Orison

A prayer; a supplication.

Orkneyan

Of or pertaining to the Orkney islands.

Orleans

A cloth made of worsted and cotton, -- used for wearing apparel.

Orlo

A wind instrument of music in use among the Spaniards.

Orlop

The lowest deck of a vessel, esp. of a ship of war, consisting of a platform laid over the beams in the hold, on which the cables are coiled.

ormolu

A variety of brass made to resemble gold by the use of less zinc and more copper in its composition than ordinary brass contains. Its golden color is often heightened by means of lacquer of some sort, or by use of acids. Called also mosaic gold.

Ormosia

A genus of tropical shrubs and trees having usually odd-pinnate leaves with large leaflets and pink to reddish wood.

Ormuzd

The good principle, or being, of the ancient Persian religion; same as Ormazd. See also Ahriman.

orn

To ornament; to adorn.

ornament

To adorn; to deck; to embellish; to beautify; as, to ornament a room, or a city.

ornamental

Serving to ornament; characterized by ornament; beautifying; embellishing.

Ornamentation

The act or art of ornamenting, or the state of being ornamented.

Ornithic

Of or pertaining to birds; as, ornithic fossils.

Ornithichnite

The footmark of a bird occurring in strata of stone.

Ornitholite

The fossil remains of a bird. A stone of various colors bearing the figures of birds.

Ornithologist

One skilled in ornithology; a student of ornithology; one who describes birds.

Ornithology

That branch of Zoology which treats of the natural history of birds and their classification.

Ornithomancy

Divination by means of birds, their flight, etc.

Ornithopappi

An extinct order of birds. It includes only the Archaeopteryx.

Ornithopoda

An order of herbivorous dinosaurs with birdlike characteristics in the skeleton, esp. in the pelvis and hind legs, which in some genera had only three functional toes, and supported the body in walking as in Iguanodon. See Illust. in Appendix.

Ornithorhynchidae

The natural family of monotremes including the platypus (duckbill) (Ornithorhyncus anatinus).

Ornithorhynchus

A genus of monotremes including the platypus (Ornithorhyncus anatinus). See Duck mole, under Duck.

Ornithosauria

An order of extinct flying reptiles; -- called also Pterosauria.

Ornithoscelida

A group of extinct Reptilia, intermediate in structure (especially with regard to the pelvis) between reptiles and birds.

Orograph

A machine for use in making topographical maps. It is operated by being pushed across country, and not only records distances, like the perambulator, but also elevations.

Orography

That branch of science which treats of mountains and mountain systems; orology; as, the orography of Western Europe.

Oroheliograph

A camera for obtaining a circular panoramic view of the horizon. The photographic plate is placed horizontally with a vertical lens above. A mirror of peculiar shape reflects light from the entire horizon to the lens, by means of which it is focused upon the plate.

Orohippus

A genus of American Eocene mammals allied to the horse, but having four toes in front and three behind.

Oroide

An alloy, chiefly of copper and zinc or tin, resembling gold in color and brilliancy.

Orology

The science or description of mountains.

Orometer

An aneroid barometer having a second scale that gives the approximate elevation above sea level of the place where the observation is made.

Orotund

Characterized by fullness, clearness, strength, and smoothness; ringing and musical; -- said of the voice or manner of utterance. The orotund voice or utterance

Orphan

To cause to become an orphan; to deprive of parents.

Orphanage

The state of being an orphan; orphanhood; orphans, collectively.

Orphanhood

The state or condition of being an orphan; orphanage.

Orpharion

An old instrument of the lute or cittern kind.

Orphean

Of or pertaining to Orpheus, the mythic poet and musician; as, Orphean strains.

Orpheus

The famous mythic Thracian poet, son of the Muse Calliope, and husband of Eurydice. He is reputed to have had power to entrance beasts and inanimate objects by the music of his lyre.

Orphic

Pertaining to Orpheus; Orphean; as, Orphic hymns.

Orphrey

A band of rich embroidery, wholly or in part of gold, affixed to vestments, especially those of ecclesiastics.

Orpiment

Arsenic sesquisulphide, produced artificially as an amorphous lemon-yellow powder, and occurring naturally as a yellow crystalline mineral; -- formerly called auripigment. It is used in king's yellow, in white Indian fire, and in certain technical processes, as indigo printing.

Orpin

A yellow pigment of various degrees of intensity, approaching also to red.

orpine

A low plant with fleshy leaves (Sedum telephium), having clusters of purple flowers. It is found on dry, sandy places, and on old walls, in England, and has become naturalized in America. Called also stonecrop, and live-forever.

Orrery

An apparatus which illustrates, by the revolution of balls moved by wheelwork, the relative size, periodic motions, positions, orbits, etc., of bodies in the solar system.

Orris

A sort of gold or silver lace.

Orsellic

Pertaining to, or designating, an acid found in certain lichens, and called also lecanoric acid.

Orsellinic

Pertaining to, or designating, an organic acid obtained by a partial decomposition of orsellic acid as a white crystalline substance, and related to protocatechuic acid.

Ort

A morsel left at a meal; a fragment; refuse; -- commonly used in the plural.

Ortalidian

Any one of numerous small two-winged flies of the family Ortalidae. The larvae of many of these flies live in fruit; those of others produce galls on various plants.

Orthid

A brachiopod shell of the genus Orthis, and allied genera, of the family Orthidae.

Orthis

An extinct genus of Brachiopoda, abundant in the Paleozoic rocks.

Orthite

A variety of allanite occurring in slender prismatic crystals.

Orthocarbonic

Designating a complex ether, C.(OC2H5)4, which is obtained as a liquid of a pleasant ethereal odor by means of chlorpicrin, and is believed to be a derivative of the hypothetical normal carbonic acid, C.(OH)4.

Orthocenter

That point in which the three perpendiculars let fall from the angles of a triangle upon the opposite sides, or the sides produced, mutually intersect.

Orthoceras

An extinct genus of Paleozoic Cephalopoda, having a long, straight, conical shell. The interior is divided into numerous chambers by transverse septa.

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