sunglass

• Lente convexa que concentra los rayos del sol para prender fuego; también, gafas de sol, aunque ese sentido es más propio del plural.

A convex lens that focuses the rays of the sun, used to start a fire.

1. Burning lensC1formal

   A convex lens that focuses the rays of the sun to produce heat, often used to start a fire.

   Lupa de sol

   • He used a sunglass to ignite the dry leaves.
   • Survivalists often carry a sunglass for starting fires.
   • The sunlight passed through the sunglass and created a small flame.