PPage 275
- English Word Phosphorus Definition The morning star; Phosphor.
- English Word Phosphorus Definition 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.
- English Word Phosphorus Definition Hence, any substance which shines in the dark like phosphorus, as certain phosphorescent bodies.
- English Word Phosphoryl Definition The radical PO, regarded as the typical nucleus of certain compounds.
- English Word Phosphuret Definition A phosphide.
- English Word Phosphureted Definition Impregnated, or combined, with phosphorus.
- English Word Photic Definition Relating to the production of light by the lower animals.
- English Word Photics Definition The science of light; -- a general term sometimes employed when optics is restricted to light as a producing vision.
- English Word Photo Definition A contraction of Photograph.
- English Word Photo- Definition A combining form from Gr. fw^s, fwto`s, light; as, photography, phototype, photometer.
- English Word Photo-electric Definition Acting by the operation of both light and electricity; -- said of apparatus for producing pictures by electric light.
- English Word Photo-electrotype Definition An electrotype plate formed in a mold made by photographing on prepared gelatine, etc.
- English Word Photo-engraving Definition 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.
- English Word Photo-epinasty Definition A disproportionately rapid growth of the upper surface of dorsiventral organs, such as leaves, through the stimulus of exposure to light.
- English Word Photobiotic Definition Requiring light to live; incapable of living without light; as, photobiotic plant cells.
- English Word Photochemical Definition Of or pertaining to chemical action of light, or produced by it; as, the photochemical changes of the visual purple of the retina.
- English Word Photochemistry Definition The branch of chemistry which relates to the effect of light in producing chemical changes, as in photography.
- English Word Photochromatic Definition Of or pertaining to photochromy; produced by photochromy.
- English Word Photochromic Definition Alt. of Photochromatic
- English Word Photochromy Definition The art or process of reproducing colors by photography.