trifocal
1tri·fo·cal
adjective \(ˌ)trī-ˈfō-kəl\Definition of TRIFOCAL
: having three focal lengths
First Known Use of TRIFOCAL
1826
2trifocal
nounDefinition of TRIFOCAL
1
plural : eyeglasses with trifocal lenses
2
: a trifocal glass or lens
First Known Use of TRIFOCAL
1899
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