"Dioptrical" is a word in ENGLISH

dioptrical ENGLISH
Definition:

Of or pertaining to dioptrics; assisting vision by
means of the refraction of light; refractive; as, the dioptric system;
a dioptric glass or telescope.

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anaclastics ENGLISH

That part of optics which treats of the refraction of light; -- commonly called dioptrics.

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binocle ENGLISH

A dioptric telescope, fitted with two tubes joining, so as to enable a person to view an object with both …

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dioptric ENGLISH

Of or pertaining to the dioptre, or to the metric system of numbering glasses.

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dioptric ENGLISH

A dioptre. See Dioptre.

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dioptric ENGLISH

Alt. of Dioptrical

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dioptrics ENGLISH

The science of the refraction of light; that part of geometrical optics which treats of the laws of the refraction …

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