Photo to Phrensied
(Pho"to) n.; pl. Photos A contraction of Photograph. [Colloq.]
(Pho"to-) A combining form from Gr. fw^s, fwto`s, light; as, photography, phototype, photometer.
(Pho`to*bi*ot"ic) a. [Photo- + biotic.] (Biol.) Requiring light to live; incapable of living without
light; as, photobiotic plant cells.
(Pho`to*chem"ic*al) a. [Photo- + chemical.] (Chem.) Of or pertaining to chemical
action of light, or produced by it; as, the photochemical changes of the visual purple of the retina.
(Pho`to*chem"is*try) n. [Photo- + chemistry.] (Chem.) The branch of chemistry
which relates to the effect of light in producing chemical changes, as in photography.
(Pho`to*chro"mic Pho`to*chro*mat"ic) a. Of or pertaining to photochromy; produced by
(Pho*toch"ro*my) n. [Photo- + Gr. color.] The art or process of reproducing colors by
(Pho"to*drome) n. [Photo- + Gr. to run.] (Physics) An apparatus consisting of a large
wheel with spokes, which when turning very rapidly is illuminated by momentary flashes of light passing
through slits in a rotating disk. By properly timing the succession of flashes the wheel is made to appear
to be motionless, or to rotate more or less slowly in either direction.
(Pho`to-e*lec"tric) a. [Photo- + electric.] Acting by the operation of both light and electricity;
said of apparatus for producing pictures by electric light.
(Pho`to-e*lec"tro*type) n. (Print.) An electrotype plate formed in a mold made by
photographing on prepared gelatine, etc.
(Pho`to-en*grav"ing) n. [Photo- + engraving.] The process of obtaining an etched
or engraved plate from the photographic image, to be used in printing; also, a picture produced by such a
(Pho`to-ep"i*nas`ty) n. [See Photo-, and Epinastic.] (Bot.) A disproportionately rapid
growth of the upper surface of dorsiventral organs, such as leaves, through the stimulus of exposure to
light. Encyc. Brit.
(Pho`to*gal`va*nog"ra*phy) n. [Photo- + galvanography.] The art or process of
making photo-electrotypes. Sir D. Brewster.
(Pho"to*gen) n. [Photo- + - gen.] (Chem.) A light hydrocarbon oil resembling kerosene.
It is obtained by distilling coal, paraffin, etc., and is used as a lubricant, illuminant, etc. [Written also
(Pho"to*gene) n. [See Photogen.]
1. A photograph. [Obsoles.]
2. A more or less continued impression or image on the retina. H. Spencer.
(Pho`to*gen"ic) a. Of or pertaining to photogeny; producing or generating light.
(Pho*tog"e*ny) n. [See Photogen.] See Photography. [Obsoles.]