I 



RIZZOLI-ESMARCH OPERATION 



1275 



ROLLE, PLANE OF 



Rkzoli-Esmarch Operation. An operation for the 

 relief of ankylosis of the lower jaw, consisting in mak- 

 ing a section of the ramus. See Operations , Table of. 



Roads, Animal. See Zoocurrent. 



Roaring (ror^-ing) [ME., rorcn, to roar]. A disease 

 of horses that causes them to make a singular noise in 

 breathing under exertion. The disease is due to paral- 

 and wasting of certain laryngeal muscles, usually 

 of the left side, resulting in a narrowing of the 

 glottis. 



Roasting (rost'-ing) [ME. , rosten, to roast]. The ap- 

 plication of heat to a degree less than that of car- 

 bonization, as the roasting of coffee ; torrefaction. 



Rob, Robb [Arab.]. A confection made of fruit-juice, 

 especially of that of the mulberry. 



Roberts' Macula. See Macula. R. Pelvis, the 

 ankylosed transversely contracted pelvis. See Peliis. 

 R. Reagent, to five volumes of filtered saturated 

 solution of magnesium sulphate add one volume of 

 strong nitric acid ; it is used to obviate the objections 

 to nitric acid in Heller's test. Proceed as in Heller's 

 test. R. Test. See Tests, Table of. 



Robertson's Pupil. See Pupil. 



Robin's Fluid. A fluid used in the microscopic study 

 of the blood. It consists of distilled water containing 

 one per cent, of chlorid of sodium, and one-half of 

 one per cent, of bichlorid of mercury. 



Robin's Gelatin Vehicle. A warm, flowing mass for 

 injecting tissues. One part of gelatin is soaked in 

 seven, eight, nine, or ten parts of water, according to 

 the consistency of the mass desired, and when soft is 

 melted on a water-bath. This vehicle is then com- 

 bined with any of the coloring-matters employed in in- 

 jecting tissues in the proportion of one part color to 

 three parts vehicle. Filter through flannel before in- 

 jecting. R.'s Rye. See Hair-cap Moss. 



Robinia (ro - bin'- e - ah) [after Jean Robin, the royal 

 gardener at Paris (1550-1629)]. A genus of legumi- 

 nous shrubs indigenous in North America. R. 

 amara, of China, is used as a stomachic tonic. R. 

 pseudacacia, the locust tree of North America. 

 Various parts of it are used by eclectic physi- 

 cians. The bark is said to be emetic and cathar- 

 tic, the flowers antispasmodic. Cases of poisoning 

 from chewing the root are recorded in which the 

 symptoms resembled those of belladonna-intoxica- 



Ition. 

 Robinin {ro* -bin-in) [after Robin, a French gardener], 

 ^-2o H 2oOi6- A glucosid obtained from the fresh flowers 

 of the locust-tree. 



Robinson's Ointment. An ointment used in treating 

 eczema of the beard. It consists of diachylon and 

 zinc-oxid ointments, each 3*ss; ammoniated-mercury 

 ointment, 3 iij ; bismuth subnitrate, 3 iss. R.'s 

 Patent Barley, a farinaceous food for infants. Its 

 composition is : water, 10. 10; fat, 0.97 ; grape-sugar, 

 3°8; cane-sugar, 0.90; starch, 77.76; soluble carbo- 

 hydrates, 4. 1 1 ; albuminoids, 5.13; gum, cellulose, 

 etc., 1.93 ; ash, 1.93. 



Robiquet's Paste. A caustic paste consisting of equal 

 parts of zinc chlorid and flour with gutta-percha. It 

 is firm and tenacious. 



Robor (ro'-bor) [L.]. Strength. 



xoborant (ro* -bo-rant) \robur, an oak ; also strength]. 

 Tonic. Strengthening. 



}s**tt{ro'-bur). See Robor. 



*oburite (ro'-bu-rit) [robur, strength]. An explosive 

 composed of dinitrobenzene, chloronitrobenzene, and 

 ammonium nitrate. Its fumes, when inhaled by 

 miners, cause headache, vertigo, vomiting, etc. 



Robust {ro-bust') [robustus; robus, robur, an oak- 

 tree]. Strong; vigorous. 



to or derived from 

 a dibasic acid ob- 

 and Lecanora tar- 



Roccella, Rocella {rok-sel'-ah, ro-sel'-aK). A genus 

 of lichens. R. tinctoria, litmus-plant, archil ; a spe- 

 cies growing in the Canary Islands, Africa, and Europe. 

 It yields litmus. 



Roccellic (rok-sel'-ik). Related 

 Roccella. R. Acid, C 1; H3,0 4 , 

 tained from Roccella tinctoria 

 tarea. 



Roccellin (rok-sel'-in). A dye consisting of the 

 sodium salt of /3-naphthalazonaphthalinsulphonic acid. 

 See Orseillin. 



Roche's Embrocation. An embrocation containing 

 amber-oil. 



Rochelle Salt (ro-shel' -sawlt). See Potassium. 



Rock (rok) [ME., rocke, rock]. A mass of stone. 

 R.-candy. See Saccharum. R. -fever. See Medi- 

 terranean Fever. R.-oil. See Petroleum. R.- 

 rose. See Helianthemum. R. -tripe. See Gyro- 

 phora. R.-weed. See Fucus. 



Rockdale System. See Sewage, Disposal of. 



Rocky Mountain Fever. A form of typhoid fever 

 occurring at high altitudes; mountain fever. 



Rod [ME., rod, rod]. I. One of numerous slender 

 rod-like or bacillary structures, as in the retina. 2. A 

 shoot or slender stem of any woody plant. Rs., 

 Acoustic. See Rs. of Corti. Rs.. Auditory. See 

 Rs. of Corti. R. -bacterium, any member of the 

 genus bacillus. Rs. of Corti. See Corti. R. -epi- 

 thelium, the striated cells lining certain structures, as 

 the ducts of the salivary glands 

 and the convoluted portions of 

 the uriniferous tubules of the 

 kidney. Rs. of Heidenhain, 

 the rod-like cells of the renal 

 tubules. See Rs., Intracellular. 

 Rs., Intracellular, the fibrillse 

 of rod-like cells. Rs. of Kcenig. 

 See Kcenig. Rs., Muscle : 1. 

 sarcous elements of the contrac- 

 tile disc of a muscle-fiber. 2. 

 The rod-shaped elements form- 

 ing the non-contractile part of a 

 muscle-fiber (Schafer). Rs. of 

 the Retina, c y 1 i n d r i c bodies 

 found in the layer of rods and 

 cones of the retina. 



Rodent {rot-dent) \rodere, to gnaw]. Eating; gnaw- 

 ing. R. Cancer. See R. Ulcer. R. Ulcer, Jacob's 

 ulcer; cancroid ulcer; ulcus excedens ; noli me tan - 

 gere ; a carcinomatous ulceration of the skin, generally 

 held to be a form of epithelioma, occurring usually in 

 the eyelid or the side of the nose, and frequently per- 

 sisting for years before developing malignancy. 



Rodostrophone (ro-dos'-trofon). An instrument for 

 transmitting articular sounds from the skull of one 

 person directly to that of another. 



Rodrigues' Aneurysm. See Aneurysm and Diseases, 

 Table of. 



Rcederer's Obliquity. See Obliquity. 



Rokitansky's Disease. Acute yellow atrophy of the 

 liver. See Diseases, Table of. R.'s Theory, a theory 

 of inflammation in which it is supposed that the first 

 step in the inflammatory process is a sweating out of a 

 fluid from the blood-vessels, and that in this fluid cells 

 are formed. 



Rolando, Arciform Fibers of. White fibers curving 

 around the lower border of the olivary body and 

 around the sides of the medulla. R., Column of. 

 See Column. R., Fissure of. See Fissures, Table 

 of R., Funicle of. See Funiculus. R., Nucleus 

 of. See Nucleus. R., Tubercle of. See Tubercle. 



Rolle, Plane of. See Plane. 



Rod -epithelium 

 from the Urinife- 

 rous Tubules. 



1. On the flat with 

 interlocking proces- 

 ses. 2. On edge, 

 showing rodded 

 character of outer 

 portion. {From Stir- 

 ling.) 



