? Obs. [ad. Gr. χρωματισμός a coloring, dyeing, f. χρωματ-ίζειν to color. Cf. F. chromatisme.]

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  1.  Natural coloring.

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1721.  Bailey, Chromatism, the natural Colour and Tincture of any thing. Ibid. (1730), II. Chromatism [with Physicians] the natural tincture or colour of the blood, spittle, urine, &c.

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1881.  in Syd. Soc. Lex.

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  2.  Optics. Chromatic dispersion or aberration.

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1854.  J. Hogg, Microsc., I. ii. (1867), 44. The corrections of chromatism.

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1878.  Lockyer, Stargazing, 123. The chromatism in one lens shall be corrected by the other.

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  3.  = CHROMISM.

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In mod. Dicts.

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