Definition of Dioptrec
Di*op"tric (?), a. (Optics)
Of or pertaining to the dioptre, or to the metric system of
numbering glasses. -- n. A dioptre. See
Dioptre.
{ Di*op"tric (?), 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.
Dioptric curve (Geom.), a Cartesian
oval. See under Cartesian.
- Webster's Unabridged Dictionary (1913)
- a simple telescope having two convex lenses
- The Nuttall Encyclopedia
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