PLATELET 



421 



PLEXUS 



Platelet. (See Illus. Diet.) 2. A microscopic plate 

 or plaque-like body. P., Yolk. See under Yolk. 



Platiculture ( pla-te-kul'-chur). The cultivation of 

 bacteria on plates. 



Plating (pla'-ting). See Platiculture. 



Platinibromid ( plaf-in-e-bro / -mid). A salt of bromo- 

 platinic acid. 



Platinode (plaf-tin-od). See Plate, Negative, of a 

 voltaic cell (Illus. Diet.). 



Platinoid {plat'-in-oid ) [platinum, e'idoc, likeness]. 

 I. Resembling platinum; applied to those metals 

 which are found associated with platinum. 



Plattnerite (plat'-nur-it) [K. F. Plattner, a German 

 chemist, 1800-1858 ]. PbO a . A native plumbic 

 peroxid. 



Piatt's Chlorides. A clear disinfectant liquid said to 

 be a solution of chlorids of magnesium, potassium, 

 sodium, zinc, and alum. 



Platycrania ( plat - e - kra' - tie - ah) [~/mtvc, broad; 

 tpaviov, skull] The flattened condition of the skull 

 produced artificially among savage tribes. 



Platylobus (plat-il'-o-bus) [jrAaric, broad; lobus, 

 lobe]. Having broad lobes. 



Platymesaticephalic. See Platymesocephalic. 



Platymesocephalic i plat-e-mes-o-sef-al'-ik) [x'/.aric, 

 broad ; fiiooc, middle ; Keqa'/.r/, head]. Applied to a 

 skull exhibiting both platycephaly and mesocephaly. 



Platymorphia (plat-e-mor* -fe-ah) [tz/Atvc, wide; 

 uodotj, form]. A flatness in the formation of the «ye 

 and shortening of the anteroposterior diameter, result- 

 ing in hyperopia. 



Platymyoid (plat-e-mi'-oid) [-'/.aric , flat ; uvr, mus- 

 cle ; eitiog, likeness]. Applied to muscle-cells in 

 which the contractile layer presents an even surface. 



Platyrrhinian {plat-ir-in , -e-an\. 1. See Platyrrhinic 

 (Illus. Diet.). 2. An individual having a broad flat 

 nose. 



Platysma. (See Illus. Diet.) P., Uterine, Charnp- 

 ney's term for the muscular fibers of the peritoneum 

 covering the ovary ; observed in cases of cysts of the 

 broad ligament. 



Platystencephalia, Platystencephaly (plat-is-ten- 

 sef-a'-le-ak, plat - is - ten - sef f -al-e) [-'Ajirvoraroc, 

 widest; i] neocuxtc, brain]. The condition of a skull 

 very wide at the occiput and with prominent jaws. 



Platystencephalic plat-is-ten-sef-al'-ik). Applied to 

 skulls marked by great width in the occipital region 

 and with prominent jaws. 



Platystencephalism [plal-is-ten-sef'-al-izm). See 

 Platystencephaly . 



Platytrope (plat' -e-trop). See Platetrope (Illus. 

 Diet.). 



Pleochroic (ple-o-kro'-ik). See Pleochromatic (Illus. 

 Diet.). 



Plesiomorphic (pies- e-o-mor* -Jik) [—/r/oior, near; 

 fiopoij, form]. Almost identical in form. 



Plesiomorphism (plese-omor' -fizm). The condition 

 of crystals which are almost alike in form but not 

 identical. 



Plessesthesia, Plessaesthesia (ples-es-the* -ze-ah) 

 [Tr'/.rjooeir, to strike ; aicQqoic, perception by the 

 senses]. A form of palpatory percussion performed 

 by placing the left middle finger firmly against the 

 body surface and percussing with the index-finger of 

 the right hand, allowing it to remain in contact with 

 the left finger for a few seconds. 



Plessigraph ( pies' -e-graph) [rz'/rjoativ , to strike ; -}pd- 

 om-, to write]. Of Peter, a form of plessimeter which 

 permits close distinctions to be made in the quality of 

 the sounds elicited and by means of a crayon attached 

 to the stem, organs or dull areas may be mapped on 

 the surface of the skin. 



Plessimetry. See Pleximetry. 



Plethora. (See Illus. Diet.) P., Cellular, P. san- 

 guinea. See Polycythemia (Illus. Diet. |. 



Pleurectomy (pleu-rek'-to-me) [jz'/evpd, pleura; enro/ir/, 

 a cutting out]. Excision of a part of the pleura. 



Pleuresia, Pleuresis {pai-rc' -zhe-ah, plu-re'-sis). See 

 Pleurisy ^lllus. Diet. ). 



Pleurisy. 1 See Illus. Diet.) Syn., Morbus lateralis; 

 M. latetum. See Signs, Andral ' s, de J/ussey's, 

 PrzewalskP s. Cf. LevaschoJjT s Method, under Treat- 

 ment. P., Bastard. See Bronchitis. Capillary (Illus. 

 Diet.). P., False, pleurodynia. P., Fetid. See 

 P., Ichorous (Illus. Diet.). P., Humid, P., Moist, 

 that accompanied by expectoration. P., Loculated. 

 See P., Encysted (Illus. Diet.). P., Metapneu- 

 monic, pleurisy following pneumonia. P., Plastic, 

 that marked by a deposit of a layer of semisolid ex- 

 udate. P., Rheumatic, P.. Rheumatismal, pleuro- 

 dynia. P., Sclerocalcareous. See P., Calcareous 

 (Illus. Diet.). P., Serofibrinous, a form marked by 

 fluid exudate containing flocculi and the deposit of 

 some fibrin. P., Typhoid, that marked by symptoms 

 of typhoid. P. with Effusion, pleurisy with effusion 

 into the pleural sac. 



Pleuritis. (See Illus. Diet.) See Sign, Beatty- 

 Bright's. P. ventosa, Sauvages' name for a pain 

 over the lower ribs believed to be due to the presence 

 of gas iii the approximate intestines. 



Pleuritogenous ( plu-rit-oj' '-en-us) [pleuritis ; ytwav, 

 to produce]. Causing pleuritis. 



Pleurocentesis ( plu-ro-sen-te'-sis) [-/.evpd, pleura ; 

 Kiv7r,Gic, a pricking]. Surgical puncture of the pleura. 



Pleurocholecystitis (plu-ro-ho-le-sist-V-tis) [rr/.tvpa, 

 pleura; \o'/t,, bile; kxgtic, bladder]. Simultaneous 

 inflammation of the pleura and the gallbladder. 



Pleurodynia. (See Illus. Diet. ) P. ventosa. See 

 Pleuritis ventosa. 



Pleurolith (plu'-rolith) [pleura; /.Woe, a stone]. A 

 calculus occurring in the pleura. 



Pleuroma [plu-ro'-mah) [pi. pleuromatd]. See Pleu- 

 ron (Illus. Diet.). 



Pleurophorous (plu-rof '-or-us) [-/evpa, the pleura; 

 ^opiiv, to bear]. Furnished with a membrane. 



Pleuropneumonitis (plu-ro-nu-mcn-i'-tis). See Pleu- 

 ropneumonia (Illus. Diet.). 



Pleurorrhea. (See Illus. Diet.) P. chylosa, chylo- 

 thorax. P. lymphatica, hydrothorax. P. puru- 

 lenta, empyema. P. sanguinea, hemorrhagic pleu- 

 risy. P. serosa, hydrothorax. 



Pleurosomia (plu-ro-so / -me-ah) [~/tvpa, side; auua, 

 body]. A form of monstrosity characterized by an 

 eventration in the side of the abdomen and thorax, 

 covered only by a membrane. 



Pleurosomus (plu-ro-so'-mus). A monster exhibiung 

 pleurosomia. 



Pleurosternite {plu-ro-stur'-nit\ [rz'ttvpov, a rib; arip- 

 viTtjc, of the breast]. Beecher's term for the mem- 

 brane beneath each pleuron or pleurotergite in Trilo- 

 bites. 



Pleurotergite {plu-ro-tttr / -jlt) [-'/evpor, rib; tergum, 

 the back]. Jaekel's term for the pleuron of Trilobites. 



Pleurotetanus 1 plu-ro-tet'-anus). See Pleurothotonus 

 (Illus. Diet.). 



Pleurotyphoid (plu-ro-ti'-foid). Typhoid fever with 

 involvement of the pleura. 



Pleximetry ( pleks-im' -et-re). Percussion by means of 

 a pleximeter. 



Plexus. (See Illus. Diet.) P., Accessory. See P., 

 Panvier's. P. alveolaris. See Veins, Alveolar. 

 P. anserinus. See Pes anserinus. P. anserinus 

 major, P. anserinus nervi facialis. See Pes anseri- 

 nus major. P. anserinus nervi mediani, the roots 



