8 letters · 15 points in Scrabble
noun eyeglasses having two focal lengths, one for near vision and the other for far vision
originFrom 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.
Etymology from Wiktionary, CC BY-SA 3.0