2 definitions found From The Collaborative International Dictionary of English v.0.48 [gcide]: Dioptric \Di*op"tric\, Dioptrical \Di*op"tric*al\, a. [Gr. ? belonging to the use of the ?; ? = dia` through + the root of ? I shall see: cf. F. dioptrique.] Of or pertaining to dioptrics; assisting vision by means of the refraction of light; refractive; as, the dioptric system; a dioptric glass or telescope. "Dioptrical principles." --Nichol. [1913 Webster] {Dioptric curve} (Geom.), a Cartesian oval. See under {Cartesian}. [1913 Webster] From The Collaborative International Dictionary of English v.0.48 [gcide]: Dioptric \Di*op"tric\, a. (Optics) Of or pertaining to the dioptre, or to the metric system of numbering glasses. -- n. A dioptre. See {Dioptre}. Dioptric
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