PLAGIODOXT 



car 



5 



half of the coronal suture, giving an oblique growth to 

 the cranial roof. 



Plagiodont (pla' -je-o-dont) [rc/Ayiw;, oblique ; bMvc, 

 tooth]. In biology, having the teeth oblique, as in the 

 converging series seen in serpents. 



Plagiopatagium, of Kolenati (pla-je-o-pat-a' -je-utn) 

 . oblique ; Tzarayelov, a border, as of a gown] . 

 In biology, that portion of the wing-membrane of bats 

 included in the endopatagiunt and mesopatagium. 



Plagiotropic (pla-je-o-tropS-ik) [irXdyiog, oblique; 

 to?, a turning]. In biology, exhibiting plagiotro- 

 pism. 



Plagiotropism (pla-je-of -ro-pizm) [-'/.ayioc, oblique ; 

 roc, a twining]. In biology, oblique geotropism; 

 growth at an angle from the vertical axis, either up- 

 ward or downward, Cf. Orthotropism. 



Plague i pldg) [-ATj-yq, a stroke]. A pest, or pestilence. 

 A contagious and highly fatal epidemic which occurred 

 in Europe in the 14th century, and also at later periods. 

 The disease had many of the characteristic symptoms 

 of malignant typhus fever, accompanied by buboes, 

 carbuncles, pustules, petechia;, and similar skin-artec- 

 ns. The period of incubation is from two to seven 

 ys ; the disease appears in a grave or ordinary form, 

 fulminant form, and a larval or abortive form. P., 

 Black, the plague which decimated the European 

 nations in the 14th century. P., Bubonic, a very 

 fatal, contagious epidemic disease, formerly prevalent 

 in various parts of the world. It is characterized by 

 fever, pain, swelling of the axillary, cervical, or in- 

 guinal lymphatic glands, delirium, coma, and in the ma- 

 jority of cases ends in death. P., Cold, a fatal form of 

 bilious pneumonia. P., Hunger, relapsing fever. P., 

 Indian. Synonym of Pali. P., Levantine, the plague 

 of the eastern part of Europe. P., Lung, pleuro- 

 pneumonia of cattle. P. -sore, a sore resulting from 

 the plague. P. -spot, a spot characteristic of the 

 plague. P., Swine, hog-cholera. P., Syrian. Syno- 

 nym of Aleppo boil. 



Plagycephalus (pla-je-sef'-al-us). See Plagicephalas. 



Planaea (pla-ne' ' -ah) [planus, flat]. In biology, a hy- 

 pothetic, astomatous metazoan, having the form of a 

 ciliated planula ; morphologically, a simple diaderm ; " 

 a bias tee a. 

 'lanar, Planary (pla'-nar, pla'-nar-e) [planus, flat]. 



Lying in a plane, 

 'lanarthragra (plan-ar-thra' '-graft) [~?xivav, to cause 

 to wander ; apfipov, joint ; aypa, a seizure]. Gout 

 which wanders from one joint to another, 

 "lanat's Tincture. See Picrotoxin. 

 'lanate (pla'-ndt) [planus, flat]. In biology, flat, 

 flattened. 



'lane (plan) [planus, flat]. Any flat and smooth sur- 

 face, especially any assumed or conventional surface, 

 whether tangent to the body, or dividing it. P. of Aeby, 

 in craniometry, that passing through the nasion and the 

 basion perpendicular to the median plane. P., Alveo- 

 condylean, in craniometry, a plane passing through 

 the alveolar point and tangent to the condyles. P., 

 Anterior Focal. See under P., Focal. P., Auriculo- 

 infraorbital, in craniometry, that passing through the 

 upper edge of the auricular foramen and the lower 

 edge of the orbit. P. of Baer, in craniometry, that 

 passing through the upper border of the zvgomatic 

 arches. P., Barclay's. See P., Palatine.' P. of 

 Blumenbach. the surface parallel with the base of a 

 cranium deprived of the lower jaw. P. of Broca. 

 See P., Visual (of Broca). P. of Busk. See P., 

 Horizontal (of Busk). P., Camper's, in craniometry, 

 the plane passing through the auricular points and the 

 1 base of the inferior nasal spine. P. of the Chasma, 

 the plane drawn tangent to the punctum spinas nasalis 



1109 PLANE 



posterioris and the punctum foraminis magni anterius. 

 P., Coccygeal. See under P. , Parallel (of the pelvis) . 

 P. of Daubenton, in craniometry, that passing through 

 the opisthion and the inferior borders of the orbits. 

 P., Double-inclined, two rectangular boards united 

 at an angle at their short sides. It is used in the 

 treatment of fractures of the femur to support the 

 limb and to relax certain muscles. P., Dumontier's. 

 See P., Horizontal (of Dumontier). P. of Diirer, in 

 craniometry, a plane tangent to the lobules of the ear 

 and the base of the nose. P., Focal, one of the two 

 planes drawn through the principal foci of a dioptric 

 system, perpendicular to the axis, or line joining the two 

 foci. P., Frankfort, in craniometry, the auriculo-infra- 

 orbital plane. P., Glabello-lambdoidean (of Hamy), 

 in craniometry, the plane of the glabella and the lambda, 

 perpendicular to the median plane. P., Glabello- 

 occipital, in craniometry, the vertical plane passing 

 through the line joining the glabella and the occiput. 

 P. of Hamy. See P., Glabello-lambdoidean. P., 

 Holder's. See P., Horizontal (of Holder). P., Hori- 

 zontal (of Busk), in craniometry, that which, passing 

 through the auricular points, is vertical to a plane drawn 

 through those points and the bregma. P., Horizontal 

 (of Dumontier), in craniometry, a plane tangent to 

 the superior borders of the zygomatic arches. P., 

 Horizontal (of Holder), in craniometry, the auriculo- 

 infraorbital plane. P., Horizontal (of Luccz), in 

 biology, that passing through the axis of the zygomatic 

 arches. P., Horizontal (of Van Shering), a plane 

 tangent to the lower rim of the orbit and passing 

 through the auricular points. P., Inclined, a plane 

 forming an angle with the plane of the horizon ; one 

 of the mechanical powers. P., Inclined (of the pelvis) ; 

 the ischiatic spines divide the pelvic cavity into two 

 unequal sections. In the larger anterior section the 

 walls slope toward the symphysis and pubic arch, and 

 are known as the anterior inclined planes. Behind 

 the spines, the lateral slopes are known as the posterior 

 inclined planes. They slope in the direction of the 

 sacrum and coccyx. P. of the Ischium, the lateral 

 wall of the true pelvis. P. of Lucae. See P., Hori- 

 zontal (of Luccb). P. of Mastication, that tangent 

 to the masticating surface of the teeth of the upper 

 jaw. P., Meckel's; in craniometry, that passing 

 through the auricular and alveolar points. P., 

 Medial, P., Median, P., Mesial, a plane, generally 

 anteroposterior, dividing a body into two symmetric 

 halves. The median plane of the animal body is termed 

 the meson. P., Merkel's, in craniometry, that pass- 

 ing through the auricular points and the lower borders 

 of the orbits. P. of Morton, in craniometry, that 

 passing through the most prominent points of the 

 occipital and parietal protuberances. P., Munich. 

 See P., Auriculo- infraorbital. P., Naso-iniac, 

 in craniometry, a plane passing through the nasion 

 and the inion. P., Naso-opisthiac, a plane passing 

 through the nasion and the opisthion P., Nuchal, 

 the surface of the occiput between the foramen mag- 

 num and the superior curved line. P., Orbital, the 

 orbital portion of the upper maxilla, or the maxillary 

 portion of the orbit. The visual plane of Broca. P., 

 Occipital, the surface of the occiput above the superior 

 curved line. P., Palatine (of Barclay), in craniom- 

 etry, the plane tangent to the arch of the palate along 

 the middle line. P., Parallel (of the pelvis), any plane 

 intersecting the pelvic axis at a right angle, hence really 

 not parallel. There are four parallel planes : one cor- 

 responds to the superior strait ; the second extends 

 from the middle of the sacrum to the level of the 

 sub-pubic ligament ; the third passes through the 

 spines of the ischia ; the fourth is the inferior strait. 



