light-sensitive cell
31rod — rodless, adj. rodlike, adj. /rod/, n., v., rodded, rodding. n. 1. a stick, wand, staff, or the like, of wood, metal, or other material. 2. a straight, slender shoot or stem of any woody plant, whether still growing or cut from the plant. 3. See… …
32Color — This article is about the perceptual property. For other uses, see Color (disambiguation). For usage of color on Wikipedia, see Wikipedia:Colors. Colored pencils Color or colour (see spelling differences) is the visual perceptual property… …
33Rod — /rod/, n. a male given name, form of Roderick or Rodney. * * * (as used in expressions) Carew Rod eccentric and rod mechanism hot rod * * * ▪ measurement old English measure of distance equal to 16.5 feet (5.029 metres), with variations… …
34smoke detector — an electronic fire alarm that is activated by the presence of smoke. Also called smoke alarm. [1925 30] * * * device used to warn occupants of a building of the presence of a fire before it reaches a rapidly spreading stage and inhibits… …
35Cone — A type of specialized light sensitive cell (photoreceptor) in the retina of the eye that provide sharp central vision and color vision. By contrast, the rods are the retinal photoreceptors that provide side vision and the ability to see objects… …
36cone — /kohn/, n., v., coned, coning. n. 1. Geom. a. a solid whose surface is generated by a line passing through a fixed point and a fixed plane curve not containing the point, consisting of two equal sections joined at a vertex. b. a plane surface… …
37Rod — A type of specialized light sensitive cell (photoreceptor) in the retina of the eye that provides side vision and the ability to see objects in dim light (night vision). By contrast, the cones are the retinal photoreceptors that provide sharp… …
38retinal cone — The other light sensitive cell type of the retina, that, unlike retinal rods, is differentially sensitive to particular wavelengths of light, and is important for colour vision. There are three types of cones, each type sensitive to red, green or …
39photodetector — noun Any device used to detect electromagnetic radiation Syn: light sensitive cell, light sensitive detector, light sensor photodevice, photodevice, photoelectric detector, photosensor …
40exposure meter — An instrument with a light sensitive cell that measures the light reflected from or falling on a subject; used as an aid to selecting the exposure setting. The same as a light meter …
