A rectangular figure.

Right-angled; rectangular; as, an orthogonal intersection of one curve with another.

Perpendicularly; at right angles; as, a curve cuts a set of curves orthogonally.

An orthographic projection, sometimes partly in section, esp. of a building.

One versed in orthography; one who spells words correctly.

Of or pertaining to orthography, or right spelling; also, correct in spelling; as, orthographical rules; the letter was orthographic.

In an orthographical manner according to the rules of proper spelling according to orthographic projection.

One who spells words correctly; an orthographer.

To spell correctly or according to usage; to correct in regard to spelling.

The right description of things.

Having the axes at right angles to one another; -- said of crystals or crystalline forms.

The art or practice of constructing verses correctly; the laws of correct versification.

Having the right form.

Of, pertaining to, or employed in, orthopedics; relating to the prevention or cure of deformities of children, or, in general, of the human body at any age; as, orthopedic surgery; an orthopedic hospital.

The art or practice of correcting disorders or deformities of the spine and joints, or, by extension, any deformities of the human body.

One who prevents, cures, or remedies deformities, esp. in children.

Same as orthopedics.

The art of correct articulation; voice training.

A name given to the two planes in the monoclinic system which are parallel to the vertical and orthodiagonal axes.

Specifically, a morbid condition in which respiration can be performed only in an erect posture; by extension, any difficulty of breathing.

An orthopedist.

An extinct order of reptiles which stood erect on the hind legs, and resembled birds in the structure of the feet, pelvis, and other parts.

The treatment of deformities in the human body by mechanical appliances.

An order of mandibulate insects including grasshoppers, locusts, cockroaches, mantids, crickets, katydids, etc. See Illust. under Insect.

One of the Orthoptera.

Of or pertaining to the Orthoptera.

Noting the system of crystallization which has three unequal axes at right angles to each other; trimetric. See Crystallization.

An instrument designed to show the condition of the superficial portions of the eye.

Giving an image in correct or normal proportions; giving a flat field of view; as, an orthoscopic eyepiece.

Designating the form of silicic acid having the normal or highest number of hydroxyl groups.

Having the seeds straight, as in the fruits of some umbelliferous plants; -- opposed to coelospermous.

A chiton, or loose, ungirded tunic, falling in straight folds.

A longitudinal rank, or row, of leaves along a stem.

Cutting at right angles.

Having two cleavages at right angles with one another.

The property of cutting at right angles.

Retaining the accent; not enclitic; -- said of certain indefinite pronouns and adverbs when used interrogatively, which, when not so used, are ordinarilly enclitic.

Having the longer axis vertical; -- said of erect stems.

Having the axis of an ovule or seed straight from the hilum and chalaza to the orifice or the micropyle; atropous.

That variety of xylene (C6H4(CH3)2) in which the two methyl groups are in the ortho position; a colorless, liquid, combustible hydrocarbon resembling benzene.

Of or relating to the time or act of rising; eastern; as, the ortive amplitude of a planet.

A European singing bird (Emberiza hortulana), about the size of the lark, with black wings. It is esteemed delicious food when fattened. Called also bunting. In England, the wheatear (Saxicola oenanthe). In America, the sora, or Carolina rail (Porzana Carolina). See Sora.

One of several species of East Indian birds of the genera Ortygis and Hemipodius. They resemble quails, but lack the hind toe. See Turnix.

A kind of sage (Salvia Horminum).

The blindworm.

A kind of antidote for poisons; a counter poison formerly in vogue.

See Oriel.

The aard-vark (Orycteropus afer).

Same as Oryctere (the aardvark, Orycteropus afer).

Mineralogy.

Description of fossils.

Of or pertaining to oryctology.

One versed in oryctology.

An old name for paleontology.

A genus of African antelopes which includes the gemsbok, the leucoryx, the bisa antelope (Oryx beisa), and the beatrix antelope (Oryx beatrix) of Arabia.

A genus of grasses including the rice plant; rice.

A genus of rodents including the rice rats.

A genus of grasses incluiding rice grass.

Pasta shaped like pearls of barley; frequently prepared with lamb in Greek cuisine.

The chemical symbol for the element osmium.

A tribe of southern Sioux Indians, now living in the Indian Territory.

Hosanna.

See 3d Os.

Of or pertaining to the Osci, a primitive people of Campania, a province of ancient Italy. The language of the Osci.

The state of oscillating; a seesaw kind of motion.

A genus of dark green, or purplish black, filamentous, fresh-water algae, the threads of which have an automatic swaying or crawling motion. Called also Oscillatoria.

That oscillates; vibrating; swinging.

Tending to oscillate; vibratory.

One that oscillates Any device or circuit for producing electric oscillations, whether of current or voltage; esp., an apparatus for generating electric waves in a system of wireless telegraphy.

Same as Oscillaria.

Moving, or characterized by motion, backward and forward like a pendulum; swinging; oscillating; vibratory; as, oscillatory motion.

An autographic record made by an oscillograph.

a device for making a record of the wave forms of fluctuating .

An apparatus for recording or indicating alternating-current wave forms or other electrical oscillations, especially of voltages or currents; it usually consists of a galvanometer with strong field, in which the mass of the moving part is very small and frequency of vibration very high.

An instrument for measuring the angle through which a ship rolls or pitches at sea.

An electronic measuring instrument which provides a visual representation of the time variation of electrical quantities, such as voltage or current. It may be used to measure the shape of a voltage pulse or the frequency of an oscillating voltage. It can also be used to measure properties of other physical variables, such as sound or light intensity, if they can be translated into electrical voltage or current.

Relating to the Oscines.

Singing birds; a group of the Passeres, having numerous syringeal muscles, conferring musical ability.

Any one of numerous species of dipterous flies of the family Oscinidae.

Of or pertaining to the Oscines.

Yawning; gaping.

In an oscitant manner.

To gape; to yawn.

The act of yawning or gaping.

To kiss one another; to kiss.

The act of kissing; a kiss.

Same as Pax, 2.

A curve whose contact with a given curve, at a given point, is of a higher order (or involves the equality of a greater number of successive differential coefficients of the ordinates of the curves taken at that point) than that of any other curve of the same kind.

One of the excurrent apertures of sponges.

Same as Oscule.

Made of osiers; composed of, or containing, osiers.

Covered or adorned with osiers; as, osiered banks.

An osier bed.

One of the principal divinities of Egypt, the brother and husband of Isis. He was figured as a mummy wearing the royal cap of Upper Egypt, and was symbolized by the sacred bull, called Apis. Cf. Serapis.

A Turkish official; one of the dominant tribe of Turks; loosely, any Turk.

A salt of osmic acid.

One of a pair of scent organs which the larvae of certain butterflies emit from the first body segment, either above or below.

A substance formerly supposed to give to soup and broth their characteristic odor, and probably consisting of one or several of the class of nitrogenous substances which are called extractives.

A salt of osmiamic acid.

Of, pertaining to, or designating, a nitrogenous acid of osmium, H2N2Os2O5, forming a well-known series of yellow salts.

Pertaining to, derived from, or containing, osmium; specifically, designating those compounds in which it has a valence higher than in other lower compounds; as, osmic oxide.

The secretion of fetid sweat.

Denoting those compounds of osmium in which the element has a valence relatively lower than in the osmic compounds; as, osmious chloride.

A salt of osmious acid.

A rare metallic element of the platinum group with atomic number 76. It is found native as an alloy in platinum ore, and in iridosmine. It is a hard, infusible, bluish or grayish white metal, and the heaviest substance known. Its tetroxide is used in histological experiments to stain tissues. Symbol Os. Atomic weight 190.2. Specific gravity 22.477.

An apparatus, consisting of a number of cells whose sides are of parchment paper, for conducting the process of osmosis. It is used especially in sugar refining to remove potassium salts from the molasses.

An instrument for recording the height of the liquid in an endosmometer or for registering osmotic pressures.

An instrument for measuring the amount of osmotic action in different liquids.

The study of osmosis by means of the osmometer.

The tendency in fluids to mix, or become equably diffused, when in contact. Same as osmosis, which see.

The tendency in fluids to mix, or become equably diffused, when in contact. It was first observed between fluids of differing densities, and as taking place through a membrane or an intervening porous structure. An older term for the phenomenon was Osmose. The action produced by this tendency.

Pertaining to, or having the property of, osmosis; as, osmotic force.

The pressure which a solution of a substance in a liquid exerts on a semipermeable membrane, through which the solvent can diffuse but the dissolved substance (the solute) cannot diffuse, when separated across the membrane from the pure solvent. In general, the osmotic pressure will depend almost proportionally up to certain concentrations upon the molal concentration of the solute.

A fern of the genus Osmunda, or flowering fern. The most remarkable species is the osmund royal, or royal fern (Osmunda regalis), which grows in wet or boggy places, and has large bipinnate fronds, often with a panicle of capsules at the top. The rootstock contains much starch, and has been used in stiffening linen.

A species of coarse linen, originally made in Osnaburg, Germany.

The small, blueblack, drupelike fruit of the Nuttallia cerasiformis, a shrub of Oregon and California, belonging to the Cherry tribe of Rosaceae.

The olfactory organ of some Mollusca. It is connected with the organ of respiration.

The fishhawk (Pandion haliaetus).

To prophesy; to presage.

A prophetic or ominous utterance.