Trifocal (noun) Definition, Meaning & Examples

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adjective
  1. having three foci.
  2. (of an eyeglass lens) having three portions, one for near, one for intermediate, and one for far vision.
noun
  1. eyeglasses with trifocal lenses.
adjective (traɪˈfəʊkəl)
  1. having three focuses
  2. having three focal lengths
noun (traɪˈfəʊkəl, ˈtraɪˌfəʊkəl)
  1. glasses with trifocal lenses
Trifocal (noun) Definition, Meaning & Examples

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