trifocals
nounEtymology
From tri- + focal (see focus). Coined by John Isaac Hawkins, their inventor, in 1826.
Definitions
Spectacles with corrective lenses that have three different powers per eye.
The neighborhood
Vish — recursive loop
No curated loop yet for trifocals. Loops are being traced one word at a time while the ingestion pipeline matures.
sense glosses and etymology drawn from English Wiktionary · source · CC-BY-SA