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Phosphoryl
n.
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The radical PO, regarded as the typical nucleus of certain compounds.
Phosphuret
n.
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A phosphide.
Phosphureted
a.
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Impregnated, or combined, with phosphorus.
Photic
a.
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Relating to the production of light by the lower animals.
Photics
n.
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The science of light; -- a general term sometimes employed when optics is restricted to light as a producing vision.
Photos
pl.
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of Photo
Photo
n.
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A contraction of Photograph.
Photo-
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A combining form from Gr. fw^s, fwto`s, light; as, photography, phototype, photometer.
Photobiotic
a.
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Requiring light to live; incapable of living without light; as, photobiotic plant cells.
Photochemical
a.
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Of or pertaining to chemical action of light, or produced by it; as, the photochemical changes of the visual purple of the retina.
Photochemistry
n.
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The branch of chemistry which relates to the effect of light in producing chemical changes, as in photography.
Photochromic
a.
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Alt. of Photochromatic
Photochromatic
a.
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Of or pertaining to photochromy; produced by photochromy.
Photochromy
n.
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The art or process of reproducing colors by photography.
Photodrome
n.
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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.
Photo-electric
a.
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Acting by the operation of both light and electricity; -- said of apparatus for producing pictures by electric light.
Photo-electrotype
n.
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An electrotype plate formed in a mold made by photographing on prepared gelatine, etc.
Photo-engraving
n.
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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 process.
Photo-epinasty
n.
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A disproportionately rapid growth of the upper surface of dorsiventral organs, such as leaves, through the stimulus of exposure to light.
Photogalvanography
n.
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The art or process of making photo-electrotypes.
Photogen
n.
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A light hydrocarbon oil resembling kerosene. It is obtained by distilling coal, paraffin, etc., and is used as a lubricant, illuminant, etc.
Photogene
n.
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A photograph.
Photogene
n.
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A more or less continued impression or image on the retina.
Photogenic
a.
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Of or pertaining to photogeny; producing or generating light.
Photogeny
n.
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See Photography.
Photoglyphic
a.
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Pertaining to the art of engraving by the action of light.
Photoglyphy
n.
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Photoglyphic engraving. See under Photoglyphic.
Photoglyptic
a.
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Same as Photoglyphic.
Photogram
n.
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A photograph.
Photograph
n.
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A picture or likeness obtained by photography.