Dioptric curve
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]


The Collaborative International Dictionary of English. 2000.

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  • 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 Collaborative International Dictionary of English

  • Dioptrical — 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;… …   The Collaborative International Dictionary of English

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