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Photoreceptor

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• Photoreception

  [foh-toh-ri-sep-shuh n] /ˌfoʊ toʊ rɪˈsɛp ʃən/ noun 1. the physiological perception of light. photoreception pho·to·re·cep·tion (fō’tō-rĭ-sěp’shən) n. The detection, absorption, and use of light, as for vision in animals or phototropism and photosynthesis in plants. pho’to·re·cep’tive (-tĭv) adj.

• Photorealistic

  [foh-toh-ree-uh-liz-uh m] /ˌfoʊ toʊˈri əˌlɪz əm/ noun, (sometimes initial capital letter) 1. a style of painting flourishing in the 1970s, especially in the U.S., England, and France, and depicting commonplace scenes or ordinary people, with a meticulously detailed , flat images, and barely discernible brushwork that suggests and often is based on or incorporates an […]

• Phreaking

  [freek] /frik/ noun 1. . verb (used without object), phreaked, phreaking. 2. to act as a phone phreak. verb (used with object), phreaked, phreaking. 3. to tamper with (telephones) as a phone phreak does. /ˈfriːkɪŋ/ noun 1. the act of gaining unauthorized access to telecommunication systems, esp to obtain free calls n. 1972, originally in […]

• Phreatic

  [free-at-ik] /friˈæt ɪk/ adjective, Geology. 1. noting or pertaining to ground water. 2. noting or pertaining to explosive volcanic activity involving steam derived from ground water: a phreatic explosion. /frɪˈætɪk/ adjective 1. (geography) of or relating to ground water occurring below the water table Compare vadose

• Phreatic zone

  phreatic zone (frē-āt’ĭk) A subsurface zone of soil or rock in which all pores and interstices are filled with fluid. Because of the weight of the overlying groundwater, the fluid pressure in the phreatic zone is greater than the atmospheric pressure. Compare vadose zone.

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