Definify.com
Webster 1913 Edition
Dioptrical
{
Di-op′tric
,Di-op′tric-al
, }Adj.
[Gr. [GREEK] belonging to the use of the [GREEK]; [GREEK] =
διά
through + the root of [GREEK] I shall see: cf. F. dioptrique
.] Of or pertaining to dioptrics; assisting vision by means of the refraction of light; refractive;
“Dioptrical principles.” as, the
dioptric
system; a dioptric
glass or telescope. Nichol.
Webster 1828 Edition
Dioptrical
DIOPTRIC
, DIOPTRICAL,Adj.
1.
Affording a medium for the sight; assisting the sight in the view of distant objects; as a dioptric glass.2.
Pertaining to dioptrics, or the science of refracted light.