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Chiefly Optics. having two foci.
(of an eyeglass or contact lens) having two portions, one for near and one for far vision.
bifocals, bifocal eyeglasses or contact lenses.
Contemporary Examples

Hold the Dressing Arianne Cohen November 10, 2008

Historical Examples

Cue for Quiet Thomas L. Sherred
Down and Out in the Magic Kingdom Cory Doctorow
“To Invade New York….” Irwin Lewis
The Brain Alexander Blade

plural noun
a pair of spectacles with bifocal lenses
(optics) having two different focuses
relating to a compound lens permitting near and distant vision


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