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There are 19 words containing IOPT

BIOPTIC	• bioptic adj. Related to biopsy. • BIOPTIC adj. relating to biopsy.
DIOPTER	• diopter n. A unit of measure of the power of a lens or mirror, equal to the reciprocal of its focal length in meters… • diopter n. The dioptre adjustment mechanism of a pair of binoculars or of a camera viewfinder. • diopter n. (Photography, dated) A lens element attached to the front of a photographic lens to shorten the lens’s…
DIOPTRE	• dioptre n. Alternative spelling of diopter. • DIOPTRE n. a measure of refractive power, also DIOPTER.
DIOPTASE	• dioptase n. An intense emerald-green to bluish-green copper cyclosilicate mineral. • DIOPTASE n. a mineral, a hydrous silicate of copper, occurring in emerald-green crystals.
DIOPTERS	• diopters n. Plural of diopter. • DIOPTER n. a measure of refractive power, also DIOPTRE.
DIOPTRAL	• dioptral adj. Synonym of dioptric. • DIOPTRAL adj. relating to a diopter, a measure of refractive power.
DIOPTRES	• dioptres n. Plural of dioptre. • DIOPTRE n. a measure of refractive power, also DIOPTER.
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.
DIOPTASES	• dioptases n. Plural of dioptase. • DIOPTASE n. a mineral, a hydrous silicate of copper, occurring in emerald-green crystals.
DIOPTRATE	• dioptrate adj. (Entomology) Divided transversely. • DIOPTRATE adj. of insects, having the compound eye divided transversely.
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.
DIOPTRICAL	• dioptrical adj. Alternative form of dioptric. • DIOPTRICAL adj. transparent, also DIOPTRIC.
DIOPTOMETER	• dioptometer n. An instrument used to measure ocular refraction, in order to prescribe corrective lenses. • DIOPTOMETER n. an instrument for measuring ocular refraction.
DIOPTOMETRY	• DIOPTOMETRY n. the measurement of ocular refraction.
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.
DIOPTOMETERS	• dioptometers n. Plural of dioptometer. • DIOPTOMETER n. an instrument for measuring ocular refraction.
DIOPTRICALLY	• dioptrically adv. In a dioptric manner. • DIOPTRICAL adv. transparent, also DIOPTRIC.
DIOPTOMETRIES	• DIOPTOMETRY n. the measurement of ocular refraction.
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: 85 words
Scrabble in French: 12 words
Scrabble in Spanish: 12 words
Scrabble in Italian: 4 words
Scrabble in German: 5 words
Scrabble in Romanian: 43 words

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