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an optical phenomenon resulting from the failure of a lens or mirror to produce a good image

an optical phenomenon resulting from the failure of a lens or mirror to produce a good image

A partial alienation of reason.

A small periodical change of position in the stars and other heavenly bodies, due to the combined effect of the motion of light and the motion of the observer; called annual aberration, when the observer's motion is that of the earth in its orbit, and daily or diurnal aberration, when of the earth on its axis; amounting when greatest, in the former case, to 20.4'', and in the latter, to 0.3''. Planetary aberration is that due to the motion of light and the motion of the planet relative to the earth.

The producing of an unintended effect by the glancing of an instrument, as when a shot intended for A glances and strikes B.

A partial alienation of reason.

A small periodical change of position in the stars and other heavenly bodies, due to the combined effect of the motion of light and the motion of the observer; called annual aberration, when the observer's motion is that of the earth in its orbit, and daily or diurnal aberration, when of the earth on its axis; amounting when greatest, in the former case, to 20.4'', and in the latter, to 0.3''. Planetary aberration is that due to the motion of light and the motion of the planet relative to the earth.

The producing of an unintended effect by the glancing of an instrument, as when a shot intended for A glances and strikes B.

1. Wandering away from the normal situation. 2. Atypical development or growth. 3. Slight mental derangement. 4. Unequal deviation of the rays of light in passing through a lens, so that the image is blurred (spherical a.) or colored (chromatic a.), owing to a breaking up of the rays of white light.

Abnormal deviation of action.

A wandering from the right path: deviation from truth or rectitude.

A wandering; deviation from.

Deviation from a natural course or condition; wandering; insanity.

The act of deviating from the right or normal straight line or course; alienation or estrangement of the mind. A small apparent motion of the fixed stars, occasioned by the progressive motion of light and the earth's diurnal or annual motion in its orbit. A deviation of the rays of light when refracted by a lens or reflected by a speculum, by which they are prevented from uniting in one point. Crown of Aberration, a luminous circle surrounding the disk of the sun, depending on the aberration of its rays, by which it appears enlarged.

The passage of a fluid of the living body into an order of vessels not destined for it. In this sense it is synonymous with the Error Loci of Boerhaave.

The flow of a fluid towards an organ different from that to which it is ordinarily directed; as in cases of vicarious hemorrhage. Aberrations of sense or judgment are certain errors in the perceptions, or certain derangements of the intellectual faculties. The word is used in optics to designate the dispersion of the rays of light in passing through a lens.

Deviation from the usual course.

Imperfect refraction or focalization of a lens.

Any deviation from the normal course.

In optics, the deviation of the rays of light from the principal focus of a curved lens or speculum.

See mental a.

An abnormal determination of one of the fluids of the body, especially the blood, to a part, as in vicarious menstruation; a metastasis.

n. Act of wandering ; devia­tion, especially from truth or moral rectitude, or from the natural state ;—alienation of mind ;—a small periodical change of position in a star or other heavenly body.

The act of deviating from the common track.