1

trifocal

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adjective tri·fo·cal \(ˌ)trī-ˈfō-kəl\

Definition of trifocal

  1. :  having three focal lengths

1826

First Known Use of trifocal

1826


2

trifocal

noun tri·fo·cal

Definition of trifocal

  1. 1 trifocals plural :  eyeglasses with trifocal lenses

  2. 2 :  a trifocal glass or lens

1899

First Known Use of trifocal

1899


Medical Dictionary

1

trifocal

play
adjective tri·fo·cal \(ˈ)trī-ˈfō-kəl\

Medical Definition of trifocal

  1. 1:  having three focal lengths

  2. 2of an eyeglass lens :  having one part that corrects for near vision, one for intermediate vision (as at arm's length), and one for distant vision


2

trifocal

noun tri·fo·cal

Medical Definition of trifocal

  1. 1:  a trifocal glass or lens

  2. 2trifocals plural :  eyeglasses with trifocal lenses

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