

PHOSPHOTUXGSTIC ACID 



1073 



PHOTOMICROGRAPH 



Phosphotungstic Acid {fos-fo-tung'-stik), H„P\Y, ? - 

 A crystalline compound of phosphoric 



acid and tungstic acid used as a test for alkaloids and 



peptones. See Tests, Table of 

 Phosphuret {Jos' -fu- ret) [owffod/wc, phosphorus]. A 



phosphid. 

 Phosphureted {fos' -fu-ret-ed). Synonym of Phos- 



Phosphuria {fos-fu'-re-ah). Synonym of Phospha- 



Photalgia {fo-tal' -je-ah) |>wc, light; a'/.yoc, pain]. 



Pain arising from too great intensity of light. 

 Photastrography { fo - las -trog'- ra-fe) [owe, light; 

 ?tar ; ypdqetv, to write] . Astronomic pho- 

 tography. 

 Photesth'esia {fo-tes-the'-ze-ah)\pU,, light; aiodqotc, 



sensation] . Sensitiveness to light. 

 D hotics fo'-tiks). Synonym of Optics. 

 Photism fo'-tizm) [puriaua, a lighting]. A sensation, 

 as of color or light, produced by hearing, taste, 

 smell, touch, or temperature, or even by the thought 

 of some object, person, or general conception. Cf. 

 Phonism. 

 ;5 hoto- -/-to-') [owe, light]. A prefix denoting con- 

 nection with or relation to light. 

 Photobiotic { fo-to-bi-ot' -ik) [owe » light ; 3iutik6c, be- 

 longing to life]. In biology, living habitually in the 

 light. 

 Photocampsis { fo-to- kamp' -sis) [owe, light ; nau^iq, a 



bending]. Refraction of light. 

 Photocautery {fo-to- kav/- ter-e ) [ 96c, light ; Kaxrrrj- 

 piov, cautery]. A cauterizing agency whose heat 

 is derived from the rays of the sun by means of con- 

 centration by lenses. 

 D hoto-chemic \ fo - to - kern' - ik) [90c, light; xvt 1 *" 1 , 

 chemistry]. Pertaining to the chemic action of light, 

 as manifested in its action on silver salts and certain 

 other compounds. 

 D hotochemist fo-to-kem'-ist) [pwc, light; XVI^ 10 * 



chemistry]. One versed in photochemistry. 

 Photochemistry {fo-to-kem' -is-tre) [owe, light ; xVf^' a t 

 chemistry]. That branch of chemistry treating of the 

 chemic action of light. 

 : hotochromatic ( fo-to-kro-maf -ik) [pwc , light ; ;rpwua, 

 color]. Pertaining to colored light. P. Treatment, 

 treatment of disease by colored light. 

 ! hotochronography {fo-to-kro-nog 4 '-ra-fe) [06c, light; 

 me ; ypdfeiv, to write]. The taking of suc- 

 - photographs of moving objects. 

 ! hotodermatic ; fo-to-der-mat* -ik) [owe, light; depua, 

 ]. In biology, having a luminous skin or ex- 

 terior; phosphorescent. 



'hotodynamic fo-to-di-nam' -ik) [owe, light ; Sivafuc, 

 ■ power]. Pertaining to the energy of light. 



notodysphoria ( fo-to- dis -fo'- re -ah) [owe, light ; 

 I dvofopia, excessive pain]. Intolerance of light, 

 aoto-epinastic (fo-to-ep-in-as'-tik) [owe, light; e-i, 

 upon ; 1 naroc, solid]. Pertaining to photo-epinasty. 

 loto-epinasty (fo-to-ep'-in-as-te) [owe, light; k~i, 

 upo: . pressed close, solid]. In biology, 



downward curvature due to exposure to light, 

 lotogene (fo'-to-jen) [owe, light ; yewav, to produce]. 

 I A retinal picture, or impression. 2. Shale-naphtha, 

 a substance derived from bituminous shales, having a 

 specific gravity of .8do to .810, boiling at I45 to 150 

 C, with a slight ethereal odor and peppery taste. It 

 I dissolves sulphur, phosphorus, iodin, fats, resins, 

 caoutchouc, etc. It is sometimes used for illuminating 

 purposes and for dissolving the fat from bones, and 

 bleaching them, in the preparation of artificial ivory. 

 otogenic {fo- to-jen'-ik) [owe, light; yevqc, pro- 

 | luring]. In biology, light-producing ; phosphorescent, 

 68 



as certain Schizomycetes. See under Bacteria, Syn- 

 onymatic Table of. 



Photogenous {fo-toj' -en-us) [0wc, light; ytvijc, pro- 

 ducing]. Producing light. 



Photogram {fo'- to -gram) [owe, light; ypauiia, a 

 writing]. A photographic representation of &n en- 

 largement obtained by the microscope. 



Photograph {jV-to-graf) [owe, light; ypatpeiv, to 

 record] . The likeness of any object produced by the 

 chemic action of light reflected from the object upon 

 a surface coated with a chemically sensitive material. 



Photographers' Cramp. See Cramp. 



Photography {fo- tog' -ra-fe) [pwc, light; ypa^etv, to 

 write]. The art of producing images of objects by 

 throwing the rays of light reflected from them upon a 

 surface coated with a film of a chemically sensitive 

 substance such as a silver salt 



Photohemotachometer {f/ -to- hem' -o-tak-om' -et-er) 

 [owe, light ; a\ua, blood ; r&xoc , swiftness ; fierpov, 

 measure] . An instrument for estimating the velocity 

 of the blood and at the same time photographing the 

 changes in the level of the blood produced by the 

 movements of the heart and of respiration. 



"Pho\.ohy$ona.s\.\c {fo-to-hipo-tias'-tik) [owe, light; vx6, 

 under ; vaoroc, solid]. Pertaining to photohyponasty. 



Photohyponasty {fo-to-hi' -po-nas-te\ [owe, light ; i~6, 

 under; vaaroc, closely pressed, solid]. In biology, 

 upward curvature due to exposure to intense light. 



Photokinetic {fo-to-kin-ef -ik) [owe, light ; mvrirucdc, 

 causing movement]. Causing movement by means 

 of the luminous rays of light. 



Photo-laryngoscopy {fo-to-lar-in-gos'-ko-pe) [owe, 

 light; /.apv}^, larynx; okotzziv, to examine]. The 

 process of photographing the larynx by the aid of the 

 laryngoscope. 



Photologic {fo-to-lof -ik) [owe, light ; 7-6yoc y science]. 

 Pertaining to photology. 



Photologist {fo-tol' -o-jist) [owe, light ; 7.6yoc, science]. 

 One versed in photology. 



Photology {fo-tol' -o-je) [Owe, light ; "t.6yoc, science]. 

 The science of the nature and laws of light ; optics. 



Photolysis {fo-tol' -is-is) [owe, light ; /.ioiq, a loosing, 

 setting free]. In biology, the movements of proto- 

 plasm under the influence of light. P., Apostrophe, 

 when the chlorophyl-grains collect on the cell-walls 

 which are parallel to the plane of incident light. P., 

 Epistrophe, when the chlorophyl-grains collect on 

 the cell-walls which are at right angles to the plane 

 of incident tight. 



Photomagnetic { fo-to-mag-nef -ik) [pwc, light ; fiay- 

 vrrnfc, magnet]. Pertaining to the power of certain 

 rays of the spectrum to render magnetic a steel needle. 



Photomagnetism {fo-to- mag' -net-hm) [owe, light ; 

 uayvrfrqc, magnet]. The relation of magnetism to 

 light. 



Photomania {fo-to-ma' -ne-ah) [owe, light ; fiavia, 

 madness] . The increase of maniacal symptoms under 

 the influence of light. 



Photometer {fo-tom' '-et-er) [Owe, light; uirpov, meas- 

 ure]. An instrument for measuring the intensity of 

 light. 



Photometric {fo - to - met' - rik) [pwc, light ; fierpov, 

 measure]. Pertaining to photometry or the measure- 

 ment of light. 



Photometry {fo-tom' -el-re) [Owe, light; fitrpov, meas- 

 ure]. The measurement of light, its rapidity, in- 

 tensity, etc. 



Photomicrograph ( fo-to -mi'- kro-graf) [Owe, light ; 

 umpoc, small ; ypa&eiv, to write]. A photograph of 

 a small or microscopic object, usually made with the 

 aid of a microscope, and of sufficient size for observa- 

 tion with the naked eye. Compare Microphotograph. 



