PYROLUSITE 



1>25 



PYXININ 



ilusite (pi-ro-lu'-sit) \jrvp, fire ; ?.ovoi<;, a wash- 

 ing]. Native manganese dioxid. 

 Pyrolysis { pi-rol'-is-is) [~£p, fire; /.iaic, solution]. 



^position by means of heat. 

 Pyrolytic ( pi-ro-lit'-ik) [~i»p, fire ; t.veiv, to dissolve]. 



lining to pyrolysis. 

 Pyromania ( pi-ro-ma' -ne-ah) [~i'P, fire; (tavia, mad- 

 " . A form of moral insanity which actuates in- 

 cendiarism. 

 Pyromaniac (pi-ro-ma' -ne-ak) [-ip, fire; uavia, mad- 



ne?.-]. One affected with pyromania. 

 Pyromeconic Acid (pi-ro-me-kon'-ik) [xip, fire ; me- 

 ]. C-H 4 3 . A crystalline acid obtained by the 

 listiilation of meconic acid, 

 pyromel ( pi'-ro-mel ) [ Tip, fire ; mel, honey]. Mo- 



Pyromellitic Acid (pi-ro-mel-it'ik). See Acid. 



Pyrometamorphism i pi-ro- met - am - orf f - ism) [~('p, 

 ; metamorphism]. Metamorphism resulting from 

 the action of heat. 



D yrometer (pi-rom'-ei-er) \_~vp, fire ; fiirpov, measure] . 



instrument for measuring the intensity of heat 



of too high a degree to be estimated by the ordinary 



thermometer. P., Optic. A photometer used as a 



meter, on the principle that the luminosity of a 



body is proportionate to its temperature. 



^yrometric (pi-ro-met'-rik) \_~i<p, fire; fierpov, meas- 

 ure]. Pertaining to the pyrometer. 



'yronaphtha ( pi-ro-naf '-thah) . See Burning Oil. 



Tyrone pi'-ron) [-ip, fire], C 5 H 4 O r Pyrocomane ; a 



substance formed when comanic and chelidonic acids 



are heated to 250 C. It is a neutral solid readily 



j soluble in water; it melts at 32. 5 C, and boils at 



1 about 3 1 5 C. 



3 yropemphigus ( pi-ro-pem' '-fig-us) \_~vp, fire ; -iuoi^, 

 i pemphigus] . Pemphigus attended with fever. 



3 yrophlyctis syriaca. Synonym of Aleppo Boil. 



j-'yrophobia (pi-ro-fo'-be-ah) [~ip, fire; oo,3oc, dread]. 

 Morbid dread of fire. 



pyrophosphate (pi-ro- fos'-faf) \^vp, fire; fyootyopoc, 

 phosphorus]. A salt of pyrophosphoric acid. 



5 yrophosphoric Acid (pi-ro-fos-for'-ik). See Acid. 



'yroptothymia (pi-rop-to-thi'-me-ah)\_-vp, fire; —roeiv, 

 to terrify; dvuoq, mind]. A form of insanity in which 

 the person imagines himself enveloped in flame. 



^opuncture < pi-ro-pungk' -tilr) \_-vp, fire ; punctura, 

 puncture]. Puncturing with hot needles. 



gyroscope (pi'-ro-skop) [~ip, fire ; ano-elv, to exam- 

 ine]. An instrument employed in determining the 

 intensity of thermal radiation. 



; yrosin 1 pi' -rosin). Same as Erythrosin. 

 yrosis 1 pi-ro'-sis) [~ip, fire]. An affection of the 

 stomach characterized by a burning sensation, accom- 

 panied by eructations of an acrid, irritating fluid. 

 "Heartburn." P., Oatmeal. See Oatmeal Pyrosis. 

 yrosphyre (pi' '-ro-sfir) [~rp, fire ; CQvpa, hammer]. 

 Same as Moxosphyra. 



'yrosulphuric Acid ( fi-ro-sul-fu' '-rik) [~vp, fire ; sul- 

 phur], H.,S.,( )-. A fuming crystalline body prepared 

 by crystallization from cold Nordhausen sulphuric acid. 

 yTotartaric Acid (pi-ro-tar-tar 1 '-ik). See Acid. 

 yrotechnia (pi-ro-tek' -ne-ah) [~ip, fire ; tex^V, art]. 

 1 he scientific application of heat. P. chirurgica, the 

 employment of fire in surgical procedures, 

 yrothonid (pi-roth' -o-nid) [irvp, fire]. A tarry sub- 

 stance resulting from the imperfect combustion of 

 hemp, cotton, and linen. 



yrotic (pi-rot f -ik) [~vp, fire]. I. Having the 

 property of inflammability. 2. Caustic, 

 yrotoxic ( pi-ro-toks' -ik) \jzvp, fire ; rbi-iKoc, poison]. 

 A caustic poison, 

 yrotoxin { pi-ro-toks' -in) \jzvp, fire ; to^ikov, poison]. 



A toxic agent generated in the course of the febrile 

 process. 



Pyrouric Acid (pi-ro-u'-rik). See Acid, Cyanuric. 



Pyrovinic Acid (pi-ro-i in'-ik). See Acid, Pyrotartaric. 



Pyroxanthin (pi-ro-zan'-thin) [~tp, fire ; gaiD.oc, yel- 

 low]. A crystalline substance found in crude wood- 

 spirit. 



Pyroxylic (pi-roks-il'-ik) [~ip, fire ; ff/.w, wood]. 

 Obtained by distilling wood. P. Spirit, methylic 

 alcohol, a product of the distillation of wood. It is 

 also called -wood-spirit and wood-alcohol. 



Pyroxylin, Pyroxylinum (pi-roks'-il-in, pi-roks-il-i' - 

 num) [~fp, fire; %i/.ov, wood: gen., Pyroxylin i~\. 

 Gun - cotton. Ordinary cotton fiber treated with 

 strong fuming nitric acid, the cellulose, C 6 H 10 O 5 , 

 being changed to trinitro-cellulose, C,H 

 It is soluble in ether, and is highly explosive by per- 

 cussion. Collodium, contains pyroxylin 4, ether 70, 

 alcohol 26. Solution should be complete. C. cum 

 cantharide (C. desiccans, B. P.), flexible collodion 

 85, cantharides 60, chloroform, q. s. C. flexile, flex- 

 ible collodion contains collodion 92, Canada turpen- 

 tine 5, castor-oil 3 parts. C. stypticum, styptic 

 collodion, tannic acid 2, alcohol 5> ether 25, collodion 

 q. s. ad. 100. 



Pyrozone (pi'-ro-zon) [rrrp, fire ; ozone]. A rapidly 

 acting antiseptic, containing 3 per cent, of H 

 water. It may be employed either internally or ex- 

 ternally without danger of toxic effects. It decomposes 

 pus with rapidity, causing effervescence. Unof. 



Pyrrhol, Pyrrol (pir'-ol) [~«p, fire; oleum, oil], C 4 H t - 

 (XH). A liquid first found in coal-tar and bone-oil. 

 It is produced by the distillation of ammonium sac- 

 charate or mucate, or upon heating glycerol to 200 

 C. It is a colorless liquid, with an odor like that of 

 chloroform. It becomes brown on exposure, and 

 boils at I3I°C. ; it has asp. gr., 0.9752 at 12. 5 C. ; it 

 is but slightly soluble in water. P. Red, C,,H u X.,0, 

 a reddish powder obtained by treating pyrrhol with 

 a strong acid. 



Pyrrolidin (pi-rol'-id-in) [xip, fire ; oleum, oil], C 4 - 

 H 9 X. A substance formed by the action of sodium 

 upon succinimid dissolved in absolute alcohol. 



Pyrrolin (pir'-ol-in) [~ip, fire ; oleum, oil], C 4 H 6 XH. 

 An oily liquid formed when pyrrhol is digested with 

 zinc dust and acetic acid. It is readily soluble in 

 water, and boils at 91 C. 



Pyruric Acid | pi-ru'-rik). Synonym of Acid, Cyanuric. 



Pyrus (pi'-rus) [L. , a pear-tree]. A genus of the Po- 

 rneie, including the apple (A/alus), the pear {P. com- 

 munis, and other species) and others. 



Pyruvic Acid (pir-u'-vik). See Acid. 



Pyruvil (pi-ru'-vil) \_~ip, fire ; ovpov, urine], C 5 H K X 4 :i . 

 A substance formed from urea and pyroracemic acid. 



Pythogenesis (pirt/io-Jen' '-es-is) [~ ifleiv, to rot ; ykvtotic, 

 genesis]. Production by means of filth. 



Pythogenic (pi-tho-jen'-ik) [-i-Oeiv, to rot; yn-vav, to 

 produce]. Arising from decomposing matter. P. 

 Fever. Synonym of Typhoid Pever. P. Pneu- 

 monia. See Pneumonia. 



Pytia (pi'-she-ah). Synonym of Colostrum. 



Pyuria (pi-u'-re-ah) [rri'ot>, pus; ovpov, the urine]. 

 Pus in the urine. 



Pyxidate (piks'-id-dt) [ttv^iY, a box]. Resembling a 

 pyxidium, or bearing pvxidia ; furnished with a lid. 



Pyxidium (piks-id'-e-um) [dim. of rrv; ic, a box : //., 

 Pvxidia] . In biology, a capsule which dehisces along 

 a circular transverse line, so that the upper part comes 

 off like a lid ; also called a pyxis. 



Pyxinin (piks'-in-in) [-tft'c, a box]. A characteristic 

 chemic substance found by Frenzel in the gregarina 

 Pyxina. 



