a 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.

Also called Polaroid Camera, Polaroid Land Camera. the first brand of instant camera, developed by Edwin H. Land and marketed since 1948.

Also called Polaroid print. a print made by such a camera.

Noun