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Phosphorus
n.
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The morning star; Phosphor.
Phosphorus
n.
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A poisonous nonmetallic element of the nitrogen group, obtained as a white, or yellowish, translucent waxy substance, having a characteristic disagreeable smell. It is very active chemically, must be preserved under water, and unites with oxygen even at ordinary temperatures, giving a faint glow, -- whence its name. It always occurs compined, usually in phosphates, as in the mineral apatite, in bones, etc. It is used in the composition on the tips of friction matches, and for many other purposes. The molecule contains four atoms. Symbol P. Atomic weight 31.0.
Phosphorus
n.
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Hence, any substance which shines in the dark like phosphorus, as certain phosphorescent bodies.
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.