1
trifocals plural
: eyeglasses with trifocal lenses
2
: a trifocal glass or lens
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“Trifocal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trifocal. Accessed 1 Dec. 2024.
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trifocal
1 of 2 adjective
tri·fo·cal
(ˈ)trī-ˈfō-kəl 
1
: having three focal lengths
2
of 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
trifocal
2 of 2 noun1
: a trifocal glass or lens
2
trifocals plural
: eyeglasses with trifocal lenses
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