POROTOMY 



1160 



PORTION 



Porotomy (por-ot'-o-me) [rropoc , pore ; rofii], a cutting]. 

 The operation of enlarging by incision the meatus of 

 the urethra. 



Porous (po'-rus) [nopoc, cavity, pore]. Having small 

 openings, or pores. 



Porphyra (por'-fir-ah) [ivoptyvpa, purple]. Porphyry, 

 one of the eruptive rocks. The leaf or tablet of por- 

 phyra is used by pharmacists in the preparation of 

 compounds. The name has been used to designate 

 scurvy and purpura, q. v. P. nautica. Synonym of 

 Scurvy. P. of the Greeks. Synonym of Purpura. 



Porphyration { por -fir - a f - shun) ( iroptyvpa, purple]. 

 The term applied by Kiiss and Duval to the first stage 

 in the gastric digestion of albuminoid substances. 



Porphyrin (por' -fir -in) [woptyvpa, purple]. An 

 amorphous substance contained in a variety of Dita 

 bark. 



Porphyrisma (por -fir- iz'- mah) [nop<j>vpa, purple]. 

 Synonym of Scarlet-fever. 



Porphyrization ( por fir-iz-a' -shun) [nop6vpa, purple]. 

 In pharmacy, the pulverization of a substance by 

 crushing it with a muller on a hard surface, usually of 

 porphyry. 



Porphyrodermitis ( por -fir- o - der - mi'- tis ) [Tiopcpvpa, 

 purple; depfia, skin; nig, inflammation]. One of a 

 group of skin-diseases including hemorrhagic maculae 

 and petechias. 



Porphyrotyphus (por-fir-o-ti'-fus) [noptyvpa, purple ; 

 Tvcj>og, typhus]. Synonym of Typhus Fever. 



Porphyroxin ( por-fir- oks' '-in) [nopfyvpa, purple ; btjvg, 

 acid]. I. One of the alkaloids of opium, becoming 

 purple when heated with dilute hydrochloric acid. 2. 

 Porphyrin, q. v. 



Porphyruria \porfir-u' '-re-ah) [rroptyhpa, purple ; ovpov, 

 urine]. The discharge of urine colored with purpurin. 



Porpoise Oil. See Oleum delphini. 



Porraceous (por-a'-se-us) [por rum, leek]. Of stools, 

 green-colored, like leek-leaves. 



Porrect (po'-rekt) [por, forth; regere, to stretch]. In 

 biology, outstretched. 



Porret's Phenomenon. When a galvanic current is 

 conducted through living, fresh, sarcous substance, 

 the contents of the muscular fiber exhibit a streaming 

 movement from the positive to the negative pole (as 

 in all other fluids) , so that the fiber swells at the nega- 

 tive pole. See also Phenomenon. 



Porrigo (por-i'-go) [L. , gen. Porriginis~\. An obsolete 

 term applied to several diseases of the scalp. P. ami- 

 antacea. Synonym of Seborrhcea capitis. P. con- 

 tagiosa. See Impetigo contagiosa. P. decalvans. 

 See Alopecia areata. P. favosa. See Favus. P. 

 furfurans. Synonym of Tinea tonsurans. P. lar- 

 valis, impetigo of the scalp conjoined with eczema. 

 P. lupinosa. Synonym of Tinea favosa. P. scu- 

 tulata. Synonym of Favus. P. tonsoria. Syn- 

 onym of Alopecia areata. 



Porrigophyta, Porrigophyte (por-ig-off'-it-ah, por'-ig- 

 o-flt). Same as Favus. 



Porrisic Acid (por-iz'-ik). See Euxanthinic Acid. 



Porro's Operation. See Operation, Porro's. 



Port [after Oporto, a city in Portugal]. A wine of 

 Portugal. P. -wine. Same as Port. See also Vittum. 

 P.-wine Mark or Stain. See Na-vus vascularis and 

 JV. maternus. 



Porta (por'-ta/i) [I-.]. I. Gate; the hilus of an organ 

 through which the vessels enter. 2. The foramen of 

 Monro. P. hepatis, P. jecoris, the transverse fissure 

 of the liver, through which the vessels enter. P. 

 labyrinthi, the fenestra rotunda. P. omenti, the 

 foramen of Winslow. 



Portagion (porta'-Je-on) [portagium , portage ; portare, 

 to carry. Of. Contagion"]. A portable materies morbi , • 



a disease-germ that may be carried ; the transmissior 

 or carrying from place to place, of disease-germs. 



Portal ( por'-tal) [porta, gate]. Pertaining to th 

 porta or hilus of an organ, especially to the port 

 hepatis. P. Canals, tubular passages in the hepati 

 substance, containing each a branch of the portal veil 

 of the hepatic artery, and of the hepatic duct. F 

 Circulation, " the passage of venous blood from th 

 capillaries of one organ to those of another befor 

 reaching the heart. There are two such circulation- 

 through the liver and through the kidneys, distil 

 guished as hepatoportal and reniportal. Only th 

 former occurs in man." The portal circulation o| 

 the human body includes the venous blood from th 

 chylopoietic viscera (stomach, spleen, and intesti 

 and this is carried to the liver by means of the port; 

 vein. P. Fissure. See Fissure. P. Fossa, th 

 transverse fissure of the liver. P. System, the systei 

 of veins collecting the venous blood from the 1 

 tive tract. P. Vein, the large vein entering tin 

 at the transverse fissure, and bringing to it the bloc 

 from the digestive tract and the spleen. 



Portal's Syrup. A syrup used in scurvy, and cm 

 taining horseradish root, scurvy - grass, nasturtiun 

 gentian, cinchona, and madder. 



Porte-, or Port- [portare, to carry]. A carri 

 holder. P. -acid, an instrument for the local 

 cation of an acid. P. -aiguille. See A'eedle-i, 

 P.-caustique, a holder for the stick of caustic. P. 

 cordon, an instrument for replacing a pro! 

 funis. P. -crayon. See P. -caustic. P.-fil. 5 

 nym of P. -ligature. P. -fillet, an instrument fi 

 applying a fillet to some part of the fetal body. P. 

 ligature, an instrument for applying a ligature to 

 deep part. P.-moxa. See Aloxa. P.-nceud, tu 

 instrument for applying a ligature to the pedicli 

 tumor. P.-pierre. Synonym of P.-caustique. 



Porter (por'-ter). See Malt Liquors. 



Porter's Sign. See Tracheal Tugging, and Signs an. 

 Symptoms , Table of. 



Porticus subgenitalis. See Syndemnium. 



Portio (por'-she-o) [L.]. Portion. Also, an : 

 viated expression for portio vaginalis uteri — the vi 

 portion of the uterus. P. alba cerebri, the 

 substance of the brain. P. aryvocalis, a short n 

 attached anteriorly to the vocal band and postc 

 to the vocal process of the arytenoid cartilage. 1 

 axillaris, the second part of the axillary artery. I 

 brachialis, the third part of the axillary artery. P 

 cervicalis, the third part of the subclavian a 

 P. cervicis uteri, the cervix of the uterus. P. cor-, 

 poris striati externa, the lenticular nucleus. 

 corporis striati interna, the caudate nucleus. P 

 dura, the facial nerve. That part of the s< 

 pair of nerves of Willis controlling the musi 

 facial expression. P. infravaginalis, the vaginal per 

 tion of the neck of the uterus. P. inter d 

 et mollem, a small funiculus between the 

 dura and portio mollis of the seventh cranial 

 P. intermedia wrisbergii. Synonym of P. I 

 duram et mollem P. mollis, the auditory nerve, 

 muscularis, the second division of the sul 

 artery. P. pectoralis, the first division oi the si 

 clavian artery. P. pylorica ventriculi, the pvfci 

 extremity of the stomach. P. splenica ventriculi. 

 the cardiac extremity of the stomach. P. thoracica, 

 the first part of the axillary artery. P. ventriculi 

 lienalis. Synonym of P. splenica ventriculi. 



Portion ( por' -shun) [ portio, a part] . A 1 tarl 



P., Descending, of the Duodenum, the second p 

 tion of the duodenum. It is about three inches in lenil 

 covered anteriorly by the peritoneum, and 



