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A wandering; a roving about. [Obs.] Cockeram.

especially from truth or moral rectitude, from the natural state, or from a type. "The aberration of youth." Hall. "Aberrations from theory." Burke.

Characterized by aberration.

The act of filling up with earth, or of forming land with alluvial earth. [Obs.]

The uncovering of anything buried or covered with earth; a taking out of the earth or ground. Woodward.

A wandering about. [Obs.] Jonhson.

A wandering, or rambling, through various places. [R.] Howell.

Condition of being serrate; formation in the shape of a saw.

ve 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. -- Achromatic prism. See Prism. -- Achromatic telescope, or microscope, one in which the chromatic aberration is correcte…

Having two or more parts of different curvatures, so combined as to remove spherical aberration; -- said of a lens. Aplanatic focus of a lens (Opt.), the point or focus from which rays diverging pass the lens without spherical aberration. In certain forms of lenses there are two such foci; and it is by taking advantage…

Freedom from spherical aberration.

Free from chromatic and spherical aberration; -- said esp. of a lens in which rays of three or more colors are brought to the same focus, the degree of achromatism thus obtained being more complete than where two rays only are thus focused, as in the ordinary achromatic objective. --Ap`o*chro"ma*tism (#), n.…

nts or decoration representing a crown; as, the paper is stamped with a crown. Crown of aberration (Astron.), a spurious circle around the true circle of the sun. -- Crown antler (Zoöl.), the topmost branch or tine of an antler; also, an antler having a cuplike top, with tines springing from the rim. -- Crown bar, on…

scale (Zoöl.), a fish scale which is thin and shows concentric lines of growth, without serrations on the margin.

Aberration of mind; delirium. J. Motley. Deliration or alienation of the understanding. Mede.

A poison which occasions a persistent delirium, or mental aberration (as belladonna).

hich the thoughts, expressions, and actions are wild, irregular, and incoherent; mental aberration; a roving or wandering of the mind, -- usually dependent on a fever or some other disease, and so distinguished from mania, or madness.

a day; constituting the measure of a day; as, a diurnal fever; a diurnal task; diurnal aberration, or diurnal parallax; the diurnal revolution of the earth. Ere twice the horses of the sun shall bring Their fiery torcher his diurnal ring. Shak.

An arrangement of two lenses for a microscope, designed to correct spherical aberration and chromatic dispersion, thus rendering the image of an object more clear and distinct. W. H. Wollaston.

ace which gives for parallel rays (as those from very distant objects) images free from aberration. It is used in reflecting telescopes. -- Parabolic spindle, the solid generated by revolving the portion of a parabola cut off by a line drawn at right angles to the axis of the curve, about that line as an axis. -- Par…