bifocals
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English[edit]
Etymology[edit]
From bi- + focal (see focus), coined in 1824 by John Isaac Hawkins, inventor of trifocals. When the concept of bifocals was originally conceived by Benjamin Franklin, he called them double spectacles.
Noun[edit]
bifocals pl (plural only)
- Spectacles that have corrective lenses of two different powers; used by people who need both distance and reading glasses.
- 2002, Zadie Smith, The Autograph Man, Penguin Books (2003), page 116:
- He unfolded a pair of bifocals and thrust them as far up the bridge of his nose as possible.
Related terms[edit]
Translations[edit]
spectacles with two different powers
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