2. Adjective. Acting as a medium for sight; making use of refraction (of lenses etc.). ¹
3. Adjective. (obsolete) Capable of being seen through. ¹
¹ Source: wiktionary.com
Medical Definition of Dioptrical
1.
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.
Lexicographical Neighbors of Dioptrical
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