PLANOORBICULAR 



420 



PLATE 



Planoorbicular (pla-no-or bik'-tt-lar). Having one 

 plane surface and one orbicular. 



Planorheumatism (plan-o-ru'-mat-izm) [nAavrj, a 

 wandering; rheumatism\ Wandering or metastatic 

 rheumatism. 



Planosarcina (plan-o-sar' '-sin-ah) \n~AavT], a wander- 

 ing; sarcina, a bundle]. A genus of eubacteria, of 

 the family Coccacea, having cell division in three direc- 

 tions, cells united in packets of eight; flagellated. 



Planospiral. See Planispiral (Illus. Diet.). 



Planosubulate (pla-no-sub'-u-lat) [planus, flat; sub- 

 ula, an awl]. Flat and smooth and resembling an 

 awl. 



Planta (plan'-tah) [L.]. The sole. 



Plantose {plan'-toz). A pale-yellow dietetic powder 

 prepared from the oil-cake of rape seed, containing 

 12% of nitrogen. Dose, 30—90 gr. (1-3 oz. ) daily. 



Planury (p/an'-u-re). Same as Planuria or Uro- 

 plania (Illus. Diet.). 



Plaque. (See Illus. Diet. ) P., Charcot's, hyperes- 

 thetic spots observed most frequently in the cervical 

 and sacral regions of neurasthenics. P.s, Opaline, 

 scattered white spots, like those caused by nitrate 

 of silver, seen on the fauces, hard palate, cheeks, and 

 lips ; an early affection in syphilis. P.s, Peyer's, 

 the agminated glands of the ileum. 



Plasma. (See Illus. Diet.) P. -current, P. -layer, 

 P.-stream, P. -zone. See PoiseuilW ' s Space (Illus. 

 Diet.). 



Plasmacules (plas / '-ma- kills). See Hemokonia. 



Plasmain (plaz'-mah-in) [^Adafia, plasma]. C 15 H 15 N. 

 A leukomain isolated from blood by Wurz (1889). 



Plasmarhexis, Plasmatorhexis. See Plasmorrhexis. 



Plasmatosis (plaz-mat-o f sis) [tv/mo/m, plasma]. The 

 liquefaction of cell substance as seen in the cells of 

 the secreting milk gland and in the cells of secreting 

 glands of the cervix uteri. 



Plasmexhidrosis ( plaz - meks - hi - dro f - sis) [nAaofia, 

 plasma; if, out of; Idpuoic, sweat]. The exudation 

 of plasma from the bloodvessels. 



Plasmocinesis ( plaz - mo - sin - e' - sis) . See Plasmo- 

 kinesis (Illus. Diet.). 



Plasmocyte ( plaz' -mo-sit) \rcAaaua, something molded ; 

 kvtoc, a cell]. Any cell, other than blood-corpuscles, 

 free in the blood-plasma. 



Plasmodiophora (plaz-mo-di-of'-o-rah) \rr~Aaofia, a 

 thing formed; ddoc, likeness; tyepeiv, to bear]. A 

 genus of fungi. P. brassicae, Woronin, a fungus para- 

 sitic upon cabbages. The close resemblance of the 

 bodies found in cancer cells to certain stages in the 

 growth of this fungus has been pointed out by Navas- 

 chine and others. 



Plasmogony. (See Illus. Diet.) 2. The differentia- 

 tion of individual primitive organisms out of the simplest 

 protoplasmic compounds in the form of monera. 

 (Haeckel.) Cf. Autogony. 



Plasmolysis. (See Illus. Diet.) 3. The escape of 

 the soluble substances of the blood-corpuscle. 



Plasmon (plaz'-mon) \rt'/dap.a, plasma]. The un- 

 altered proteid of milk. P. -butter, a mixture of the un- 

 altered proteid of milk (6.58%) with butter (51.50%), 

 water 41.20%, salt 0.72%. It resembles clotted 

 cream in appearance and taste and serves as a substi- 

 tute for cod-liver oil. 



Plasmophagous ( plaz-tnof f -ag-us) [ir?,dafia, plasma ; 

 <f>ayeiv, to eat]. Living upon protoplasm ; applied to 

 organisms causing decomposition of organic matter. 



Plasmoptysis ( plaz -mo- ti' -sis) [n/,dofia, plasma; 

 irrhaic, a splitting]. A. Fischer's term for plasmos- 

 chisis (2). 



Plasmorrhexis ( plaz-mor-eks'-is) [irldafia, plasma; 

 pij^ir, a bursting]. The rupture of a cell and the 



escape or loss of the plasma. Syn., Erythrocytor- 

 r /text's. 



Plasmoschisis. (See Illus. Diet.) 2. The splitting 

 of a cell, as the formation of disciform bodies by red 

 blood-corpuscles. Syn., Plasmoptysis. See Erythro- 

 cytoschisis. 



Plasmosome ( plaz' '-mo-som) [irAaofia, plasm; cufia, 

 body]. Arnold's term for one of the granular struc- 

 tural elements of cells. 



Plasmotropic (plaz-mo-trop/-ik) [rrAdofta, plasma; 

 Tponii, a change]. Producing protoplasmic degenera- 

 tion ; applied to hemolytic action which leaves the red 

 corpuscles intact in the circulation, but through the 

 influence of poisons on the liver, spleen, and bone- 

 marrow, causes excessive destruction of them in these 

 organs. 



Plaaom (plaz' -dm). A proprietary preparation from 

 milk. 



Plastogamy (plas-tog' -am-e) [irA&Ofia, plasma; ~)d/uoc, 

 marriage]. Permanent conjugation of cells which is 

 limited to the cytoplasm. Cf. Karyogamy. 



Plate. (See Illus. Diet.) P., Bone. See P., Ap- 

 proximation (Illus. Diet.). P. -bone, the scapula. 

 P., Collecting. See P., A T egative, of a voltaic cell 

 (Illus. Diet.). P., Cytoplasmic, the part of the cell- 

 plate contained within the cell-body. P., Deck, in 

 the embryonic medullary cord a thin zone or plate con- 

 necting the dorsal zone of His (q. v.). Ger., Deck- 

 platte. P., End-. (See Illus. Diet.) 2. The 

 achromatic masses at the poles of the spindle in the 

 mitosis of Protozoa, probably equivalent to the attrac- 

 tion-spheres. Syn., Pole-plates. P., Epiphysial. See 

 Disc, Epiphysial. P., Franklin, a glass plate par- 

 tially covered on both sides with tinfoil, used as a con- 

 denser in frictional electricity. When rolled up, it 

 constitutes a Leyden or Kleist jar. Syn., Fulminat- 

 ing pane. P., Generating. See P., Positive (Illus. 

 Diet.). P., Horn (Ger., Hornplatte), Haeckel' s 

 term for the Lamella ceratina (Illus. Diet.). P., In- 

 fraspinous, the postscapula. P., Internasal. See 

 P., Frontonasal (Illus. Diet.). Ps., Intervertebral, 

 the intervertebral discs. P., Kidney, Primitive. 

 See Lamella renalis (Illus. Diet.). P., Leather. 

 See Lamella coriaria (Illus. Diet.). P., Loral, in 

 herpetology, the plate between the eye and the mouth. 

 P.s, Mansford's (John G.), an apparatus for apply- 

 ing electricity, consisting of two small metal plates of 

 opposite electric value which are placed over two 

 blistered areas on the skin at some distance apart and 

 the plates connected with a wire. P., Marrow. 

 Ger., Markplatte. See Lamella medullaris (Illus, 

 Diet.). P., Mucous. See Lamella mucosa (Illus. 

 Diet.). P., Neural. See P., Dorsal (Illus. Diet.). 

 P., Nucleus. Ger., Kernplatte. See P., Equatorial 

 (Illus. Diet.). P., Pole. See P., End-. P., Pre- 

 scapular, the prescapula. P., Primitive Kidney. 

 See Lamella renalis (Illus. Diet.). P., Principal, 

 Ilauptplatte of Waldeyer, the main plate of plate-like 

 connective-tissue cells which contains the nucleus and 

 has two or more secondary plates extending at right 

 angles to it. P., Regulation, a plate worn in the 

 mouth to correct irregularities in the position of the 

 teeth. P., Retention, a plate worn in the mouth to 

 keep in position teeth which have been straightened 

 from abnormal positions by a regulation plate. P., 

 Secondary. See under P., Prim ipal. P.s, Senn's. 

 See P.s, Approximation (Illus. Diet.). P., Spiral. 

 See Lamina spiralis (Illus. Diet.). P., Tarsal, a 

 tarsal cartilage. P., Terminal. See P., End-. P., 

 Top-, the cuticular formation, sometimes homogeneous, 

 sometimes striated, on the free surface of many colum- 

 nar cells. 



