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There are 9 words containing OPTRI

DIOPTRIC	• dioptric adj. Acting as a medium for sight; making use of refraction (Of lenses, etc.). • dioptric adj. (Obsolete) Pertaining to a diopter. • dioptric adj. (Obsolete) Capable of being seen through.
CATOPTRIC	• catoptric adj. Of, relating to, or produced by mirrors or reflections. • CATOPTRIC adj. relating to reflection, also CATOPTRICAL.
DIOPTRICS	• dioptrics n. Plural of dioptric. • dioptrics n. The study of the refraction of light, especially by lenses. • DIOPTRICS n. the study of light refraction.
CATOPTRICS	• catoptrics n. The branch of optics dealing with reflection. • CATOPTRICS n. the branch of optics which is concerned with reflected light.
DIOPTRICAL	• dioptrical adj. Alternative form of dioptric. • DIOPTRICAL adj. transparent, also DIOPTRIC.
CATOPTRICAL	• catoptrical adj. Alternative form of catoptric. • CATOPTRICAL adj. relating to reflection, also CATOPTRIC.
CATADIOPTRIC	• catadioptric adj. (Optics) Of or pertaining to optical systems that employ both refractive (dioptric) and reflective (catoptric)… • CATADIOPTRIC adj. relating to or employing both reflection and refraction, as in the construction of some long-focal-length photographic lenses, also CATADIOPTRICAL.
DIOPTRICALLY	• dioptrically adv. In a dioptric manner. • DIOPTRICAL adv. transparent, also DIOPTRIC.
CATADIOPTRICAL	• catadioptrical adj. Catadioptric. • CATADIOPTRICAL adj. relating to or employing both reflection and refraction, as in the construction of some long-focal-length photographic lenses, also CATADIOPTRIC.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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English Wiktionary: 17 words
Scrabble in French: 8 words
Scrabble in Spanish: 14 words
Scrabble in Italian: 4 words
Scrabble in German: 2 words
Scrabble in Romanian: 23 words

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