a. and sb. [ad. L. compōnent-em, pr. pple. of compōnĕre to compose.]

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  A.  adj. Composing, constituting, making up, constituent.

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1664.  Power, Exp. Philos., I. 57. Camphire … spends itself by continually effluviating its own Component Particles.

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1775.  T. Sheridan, Art Reading, 102. Words, as distinguished from their component letters or syllables.

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1814.  Southey, Roderick, xxiii. Thy component dust.

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1863.  H. Cox, Instit., 4. The separation of government into its two component parts, Legislature and the Executive.

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1871.  Lockyer, Elem. Astron., xlviii. The brilliancy of the component stars is nearly equal.

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  B.  sb.1. ? One who makes composition; a compounder. Obs.

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1563.  Bp. Grindal, in Abp. Parker’s Corresp. (1853), 196. If, because the Queen’s Majesty … pardoned the components, that sum be now cast into the arrearages.

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  2.  A constituent element or part.

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  Logically applicable only in plural to the whole of the elements or parts of a compound body; but in practice each element is called a component.

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1645.  Digby, Of Man’s Soul, x. § 10. Single apprehensions [being] the components of judgments.

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1755.  Johnson, Pref. Eng. Dict. Compounded or double words [which] obtain a signification different from that which the components have in their simple state.

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1836.  Lytton, Athens (1837), I. 461. Revenge made a great component of his … character.

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1860.  Tyndall, Glac., I. v. 38. The red component of this light is, as it were, abstracted from it.

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