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The act of infracting or breaking; breach; violation; nonobservance; infringement; as, an infraction of a treaty, compact, rule, or law. I. Watts.

One who infracts or infringes; a violator; a breaker.

An explosive compound of nitroglycerin. See Nitroglycerin.

To bend sharply and abruptly back; to break off.

Capable of being refracted.

Bent backward angularly, as if half-broken; as, a refracted stem or leaf.

Serving or tending to refract; as, a refracting medium. Refracting angle of a prism (Opt.), the angle of a triangular prism included between the two sides through which the refracted beam passes in the decomposition of light. -- Refracting telescope. (Opt.) See under Telescope.

The act of refracting, or the state of being refracted.

Serving or having power to refract, or turn from a direct course; pertaining to refraction; as, refractive surfaces; refractive powers. Refractive index. (Opt.) See Index of refraction, under Index. -- Absolute refractive index (Opt.), the index of refraction of a substances when the ray passes into it from a vacuum.…

The quality or condition of being refractive.

A contrivance for exhibiting and measuring the refraction of light.

Anything that refracts; specifically: (Opt.)

In a refractory manner; perversely; obstinately.

The quality or condition of being refractory.

Obstinate in disobedience; contumacious; stubborn; unmanageable; as, a refractory child; a refractory beast. Raging appetites that are Most disobedient and refractory. Shak.

A second breaking (as of a badly set bone) by the surgeon.

Refracted; as, a retrofract stem.

To reduce to lower terms, as a fraction.

ed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed. -- Achromat…

The art of calculating with any species of notation; as, the algorithms of fractions, proportions, surds, etc.