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or sides, and two equal and parallel triangular ends or bases; -- used in experiments on refraction, dispersion, etc.

lors of the spectrum, and formed in the part of the hemisphere opposite to the sun by the refraction and reflection of the sun's rays in drops of falling rain.

ion, -- usually measured and designated by the strength of the lens which if added to the refracting media of the eye would cause the rays from the near point to appear as if they came from the far point. -- Range finder (Gunnery), an instrument, or apparatus, variously constructed, for ascertaining the distance of an…

ys, below. -- Extraordinary ray (Opt.), that one or two parts of a ray divided by double refraction which does not follow the ordinary law of refraction. -- Ordinary ray (Opt.) that one of the two parts of a ray divided by double refraction which follows the usual or ordinary law of refraction. -- Pencil of rays (Ge…

Kicking back; recalcitrating; hence, showing repugnance or opposition; refractory.

A kicking back again; opposition; repugnance; refractoriness.

Capable of being refracted, or turned out of a direct course, in passing from one medium to another, as rays of light. -- Re*fran"gi*ble*ness, n.

The power possessed by a substance to refract a ray; as, different substances have different refringencies. Nichol.

Pertaining to, or possessing, refringency; refractive; refracting; as, a refringent prism of spar. Nichol.

sposed to fight against; hostile; at war with; being at variance; contrary; inconsistent; refractory; disobedient; also, distasteful in a high degree; offensive; -- usually followed by to, rarely and less properly by with; as, all rudeness was repugnant to her nature. [His sword] repugnant to command. Shak. There is no…

Impatient under coercion, chastisement, or opposition; refractory.

Refracted; as, a retrofract stem.

Toward the side; sidewise. A second refraction made sideways. Sir I. Newton. His beard, a good palm's length, at least, . . . Shot sideways, like a swallow's wings. Longfellow.

A device for determining the refractive state of the eye by observing the movements of the retinal lights and shadows. -- Ski*as"co*py (#), Ski*as"co*py (#), n.

The several colored and other rays of which light is composed, separated by the refraction of a prism or other means, and observed or studied either as spread out on a screen, by direct vision, by photography, or otherwise. See Illust. of Light, and Spectroscope.

rpose from points of view a little way apart. It is furnished with two eyeglasses, and by refraction or reflection the pictures are superimposed, so as to appear as one to the observer.

; hence, unreasonably obstinate in will or opinion; not yielding to reason or persuasion; refractory; harsh; -- said of persons and things; as, stubborn wills; stubborn ore; a stubborn oak; as stubborn as a mule. "Bow, stubborn knees." Shak. "Stubborn attention and more than common application." Locke. "Stubborn Stoics…

A short run by a race horse in exercise. Sweat box (Naut.), a small closet in which refractory men are confined. -- Sweat glands (Anat.), sudoriferous glands. See under Sudoriferous.

An electric glow lamp having filaments of metallic tungsten. Such lamps, owing to the refractory nature of the metal, may be maintained at a very high temperature and require an expenditure of only about 1.25 watts per candle power.

Disposed to insubordination and disorder; restless; unquiet; refractory; as, turbulent spirits. Sagacious, bold, and turbulent of wit. Dryden.