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Definition of trifocals in English English dictionary
- Spectacles with corrective lenses that have three different powers per eye
- {i} eyeglasses with trifocal lenses, eyeglasses having lenses with three focal lengths
- spectacles that have corrective lenses of three different powers for each eye
trifocals
Pronunciation
Etymology
() From tri- + focal (see focus). Coined by John Isaac Hawkins, their inventor, in 1826.Resimler
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