PYRETOGENIC 



1224 



PYROLOGY 



Pyretogenic (pi-ret-o-jen' '-ik) \_tvvpet6q, fever ; yevvav, 

 to produce]. Causing or producing fever. 



Pyretogenin (pi-ret-oj' -en-in) [ irvperoq, fever; ysvvav, 

 to produce]. A substance (probably a ptomain) 

 formed by microorganisms. Its composition is un- 

 known. It has the property of producing fever when 

 inoculated into animals. 



Pyretogenous (pi-ret-of '-enus). Synonym of Pyreto- 

 genic. 



Pyretography (pi-ret-og' -ra-fe) [nvpETdg, fever; ypd- 

 <psiv, to write]. A treatise on fevers. 



Pyretology (pi-ret - ol' - o - je) [nvperdc, fever; \6yoq, 

 treatise]. The science of the nature and characteris- 

 tics of fevers. 



Pyretophthalmia (pi - ret - off- thai' -vie-ah) [rrvpsT6q, 

 fever; 6<pda?i/u6q, eye], i. Ophthalmia caused by a 

 febrile disease. 2. A febrile affection complicated by 

 ophthalmia. 



Pyretorthopnea (pi-ret-or-thop-ne' '-ah) \jtvpET6q, fever ; 

 6p66q, straight; ttvotj, breath]. Orthopnea attended 

 with fever. 



Pyrexia (pi-reks' '-e-ah) [Ttvpsl-iq, fever]. Elevation of 

 temperature above the normal. Fever. 



Pyrexial, Pyrexic (pi-reks' -e-al, pi-reks' -ik) [TtvpeS-iq, 

 fever]. Pertaining to pyrexia. P. Tincture. See 

 Warburg's Tincture. 



Pyrexialis, Tinctura (pi-reks- e-a' -lis). See War- 

 burg's Tinctttre. 



Pyrexy (pi-reks' -e). Same as Pyrexia. 



Pyrgocephaly ( pir-go-sef -al-e) \jvvpyoq, tower ; ns<p- 

 a'/Jj, head]. The condition in which the vertex rises 

 as an eminence above the level of the skull. 



Pyria (pi'-re-ah) \_irvp, fire]. Hot bath, vapor-bath; 

 hot fomentation. 



Pyriastes (pir-e-as'-tez). Synonym of Colostrum. 



Pyridin (pi' -rid-in) [nvp, fire], C 5 H 5 N. An alkaloid, 

 prepared from bone-oil, and also obtained from all the 

 pyridin-carboxylic acids on distillation with lime. It is 

 a pungent-smelling liquid, miscible with water, of sp. 

 gr. 1.0033 at o° C. and boiling at I I4.8°C. It is useful 

 in allaying asthmatic paroxysms. Dose gtt. vj-xv ; by 

 inhalation, f^j-f^iss. Unofficial. 



Pyriform (pir'-ifor/n) [pyrus, pear; forma, a form]. 

 Pear-shaped. Pyriformis Muscle. See Muscles, 

 Table of. 



Pyrimania (pi-rim- a' -ne-ah). Synonym of Pyromania. 



Pyrites (pi'-rit-ez) \jtvpnriq, flint]. Either of the com- 

 mon sulphids of iron, pyrite and marcasite. P., 

 Arsenical, pyrites occurring as a mixture of several 

 sulphids of arsenic. P., Iron, the ordinary pyrites. 



Pyro- (pi'-ro-) \jtvp, fire]. A prefix signifying con- 

 nection with or relation to fire, or heat. 



Pyro-acetic (pi-ro-as-e' -tik) [xvp, fire ; acetum, acid]. 

 Pertaining to or obtained from acetic acid by the ac- 

 tion of heat. P. Spirit. Synonym of Acetone. 



Pyro-acid (pi- ro-as'-id) [rrvp, fire ; acidus, acid]. A 

 product obtained by subjecting certain organic acids 

 to heat. 



Pyroantimonic Acid (pi- ro-an- tim -o' - nik) . See 

 Pyrantimonic Acid. 



Pyroarsenic Acid (pi-ro-ar-sen'-ik) \_irvp, fire; arseni- 

 cum, arsenic], H 4 As 2 7 . A tetrabasic acid produced 

 when arsenic is heated to 180 C. 



Pyroboric Acid (pi-ro-bo'-rik) \_nvp, fire; boron'], 

 H. ; B 4 8 . A dibasic acid produced by heating boric 

 acid. 



Pyrocatechic Acid (pi-ro- kat' -e-chik). Synonym of 

 Pyrocatechin. 



Pyrocatechin (pi-ro-kat-e' -chin) [nvp t fire ; catechu], 

 C,H 4 (OH), = C 6 H 6 2 . Catechol ; a substance first 

 obtained in the distillation of catechin (the juice of 

 Mimosa catechu). It is formed by the dry distillation 



of proto-catechuic acid. It crystallizes in shor" 

 rhombic prisms and sublimes in shining leaflets ; i-, 

 soluble in water, alcohol, and ether; melts at 104 

 C. and boils at 245 C. Its alkaline solutions tun 

 black on exposure to air. It is an antipyretic. 



g r - j-iij- 



Pyrocatechinic Acid, Pyrocatechuic Acid ( 

 kat-e-chin'-ik, pi - ro - kat-e- chu'- ik ). Synonvi 

 Pyrocatechin. 



Pyrocitric Acid (pi-ro-sit'-rik) [irvp, fire; citrus, 

 lemon]. An acid formed from citric acid by distilla- 

 tion. The term includes several acids. 



Pyrocoll (pi'-ro-kol) [ irvp, fire; noAAa, glue]. 1. 

 The amid anhydrid of carbopyrrolic acid. It cm- 

 tallizes in yellow leaflets, melting at about 26S C. 

 2. C ]0 H 6 N 2 O 2 . A substance obtained in the drv 

 distillation of gelatin. 



Pyrocomane (pi-ro-ko'-man). See Pyrone. 



Pyrodextrin (pi-ro-deks'-trin) \j:vp, fire ; dexter, right], 

 C 48 H 7t O S7 . A brownish solid resulting from the ac- 

 tion of heat upon dextrin. 



Vyxo&n (pi'-ro-din) [rrvp, fire], C 6 H 3 .C 2 H 3 O.N,H, 

 Acetyl-phenyl-hydrazin. A white, sparingly soluble 

 powder, a powerful antipyretic. Dose l / 2 to 4 grain,. 



Pyrogallate (pi-ro-gaV-at) \jri<p, fire; galla, galls]. 

 A salt of pyrogallic acid. 



Pyrogallic Acid (pi-ro-gal* '-ik). See Acid. 



Pyrogallocarbonic Acid (pi f - ro - gal' -o-kar-botem 

 \rcvp, fire ; galla, galls ; carbon, carbon] . A substance 

 prepared by heating pyrogallic acid with a five percent, 

 solution of sodium carbonate, and dissolving tli 

 duct in cold strong sulphuric acid. It is used 

 delicate test for nitric acid. 



Pyrogallol (pi-ro-gal' -ol) \irvp, fire; galla, l 

 C 6 H 3 (OH) 3 . Pyrogallic acid: a phenol dern 

 produced by the action of heat on gallic acid. It 

 occurs in long, flattened prisms, colorless, bitl 

 taste, soluble in water, alcohol, and ether, h 

 affect the blood and produce hemoglobinuria. I 

 powerful reducing agent. It is used as a local appli- 

 cation in dermatology. 



Pyrogen (pi' -ro-jen) \nvp, fire ; ysvvav, to produce]. I. 

 A substance capable of producing fever. 2. The 

 electric fluid. 



Pyrogenesia, Pyrogenesis (pi-ro-jen-e' -ze-ah, pi-rc 

 jen'-es-is) \jtvp, fire; ykvEoiq, origin]. The produc- 

 tion of heat or fever. 



Pyrogenetic, Pyrogenic (pi-ro-jen-et'-ik, pi-ro-jer&m 

 [Kvp, fire; ysvvav, to produce]. Producing heat 

 fever. 



Pyrogenic (pi-ro-jen'-ik) \jrvp, fire ; yevvav, t 

 duce]. Producing fever. 



Pyrogenous (pi-roj' -en-us) [nvp, fire; yswdv, t 

 duce]. Produced by heat. 



Pyroglucic Acid (pi-ro-glu'-sik). Synonym of Pyr 

 dextrin. 



Pyroglycin (pi-ro-gli'-sin). Synonym of Metagiyak 



Pyroguaiacic Acid (pi-ro-gwl-ak' -ik). Synonym J 

 Guaiacol. 



Pyroleum ( pi-ro' -le-um) \nvp, fire ; oleum, oil]. 

 Petroleum. 2. An oil produced by dry distillatioafc 



Pyroligneous (pi-ro- lig'- ne-us) \_~vp, (in 



wood]. Pertaining to the destructive distillation 

 wood. P. Acid, wood- vinegar. See Acid, fl 

 ligneous. P. Alcohol, P. Spirit. Synonym of AfA 

 alcohol. P. Vinegar. Synonym of Acid, Tvr 

 neons. 



Pyrolithic Acid (pi-ro-lilh'-ik). Synonym ol 

 Cyan uric. 



Pyrology (pi-rol'-o-je) [Trip, fire; Myoc, science]. A 

 study of the application of heat, especially with refe 

 ence to surgical processes. 



