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bn:00010282n
Noun Concept
Categories: 18th-century inventions, American inventions, Eyewear, Inventions by Benjamin Franklin, Glasses
EN
bifocals  bifocal lens
EN
Eyeglasses having two focal lengths, one for near vision and the other for far vision WordNet 3.0
Definitions
Relations
Sources
EN
Eyeglasses having two focal lengths, one for near vision and the other for far vision WordNet 3.0
(plural) eyeglasses having two focal lengths, one for near vision and the other for far vision Open English WordNet
Bifocals are eyeglasses with two distinct optical powers. Wikipedia
Eyeglass lens with two distinct optical powers Wikidata
Spectacles that have corrective lenses of two different powers; used by people who need both distance and reading glasses. Wiktionary
Spectacles with two different powers. Wiktionary (translation)
IS A
spectacles
lens
DISCOVERER OR INVENTOR
Franklin
USAGE DOMAIN
plural
WordNet 3.0 & Open English WordNet
EN
bifocals
Wikipedia
EN
bifocals
Wikidata
EN
bifocal lens
Wiktionary
EN
bifocals
Wikipedia Redirections
EN
Bifocal glasses, bifocal lens, Bifocal Lenses
Wikidata Alias
EN
bifocals

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