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sunglass

sunglass

2 9.9
A curved lens that focuses sunlight to start a fire
  • noun
  • /ˈsʌnˌɡlæs/
  • Archaic
translation icon : lente convexa
  • Survivors often rely on a sunglass to start a fire in the wilderness using just sunlight.
  • sunglass lens
  • sunglass case
  • sunglass brand

Examples

  • Sunglasses on, carrying her duffel bag and porta pet, Electra heads for a bank of elevators.

    Fiction book (1995)
  • With the right technique, you can use a sunglass to focus sunlight and ignite dry leaves.

  • Another writer contacted sunglass manufacturers to learn about any new models for the coming year.

    Academic text (2010)
  • Sunglasses are a must; the bigger, the better.

    Blog text (17)
  • Sunglasses are now not only considered a necessity, but they have also become an unavoidable fashion accessory.

    Blog text (23)
  • Sunglasses with polarized lenses straddled the crown of his head.

    Fiction book (2001)
  • Sunglasses hung from a chain around her neck, and she wiped their lenses while reciting her credentials.

    Fiction book (2002)
  • He used a well-shaped sunglass to concentrate the sun's rays, successfully lighting the tinder.

Synonyms

convex lens
vssunglass
  • Specialized
4.4

A lens that is thicker in the center and brings light to a point

is mainly used to concentrate sunlight, especially to ignite material
Fresnel
vssunglass
  • Specialized
9.4

A thin lens with rings that focuses light for long distances

is a plain curved form used to concentrate sunlight to ignite material

How Focused

sunglass
  • Archaic
2 9.9
lens
175 2.5

Surface Forms

sunglass singular
sunglasses plural

Morphology

sunglass = sun + glass (transparent) = sun + glass

Direct compound of 'sun' + 'glass' referring to a piece of glass/lens used with sunlight to focus its rays, which a learner can infer from the components.

Etymology

Sunglass is simply sun + glass, meaning a piece of glass for the sun that can 'focus' sunlight. So a sunglass was a curved lens used to concentrate the sun's rays, and people once used it to start fires.