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单词 polaroid
释义

WordReference Random House Learner's Dictionary of American English © 2024
Po•lar•oid /ˈpoʊləˌrɔɪd/USA pronunciation   [Trademark.]
  1. Optics, Trademarks[uncountable] a brand of glare-reducing material, used on sunglasses, etc.
  2. Photography, Trademarks[countable] the first brand of instant camera, developed by Edwin H. Land and marketed since 1948.
  3. Photography, Trademarks[countable] a print made by such a camera.

WordReference Random House Unabridged Dictionary of American English © 2024
Po•lar•oid  (pōlə roid′),USA pronunciation [Trademark.]
  1. Optics, Trademarksa brand of material for producing polarized light from unpolarized light by dichroism, consisting typically of a stretched sheet of colorless plastic treated with an iodine solution so as to have long, thin, parallel chains of polymeric molecules containing conductive iodine atoms. It is used widely in optical and lighting devices to reduce glare.
  2. Photography, TrademarksAlso called Polaroid Camera, Polaroid Land Cam′era. the first brand of instant camera, developed by Edwin H. Land and marketed since 1948.
  3. Photography, TrademarksAlso called Polaroid print. a print made by such a camera.

Collins Concise English Dictionary © HarperCollins Publishers::
Polaroid /ˈpəʊləˌrɔɪd/ trademark n
  1. a type of plastic sheet that can polarize a transmitted beam of normal light because it is composed of long parallel molecules. It only transmits plane-polarized light if these molecules are parallel to the plane of polarization and, since reflected light is partly polarized, it is often used in sunglasses to eliminate glare
  2. Polaroid Land Cameraany of several types of camera yielding a finished print by means of a special developing and processing technique that occurs inside the camera and takes only a few seconds to complete
  3. (plural) sunglasses with lenses made from Polaroid plastic
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