SHELLAC 



1321 



SIAGONAGRA 



lell-secreting gland of a mollusc ; [b) a coiled tubu- 

 gland lying in the shell-fold or in the cephalo- 

 aoracic carapace, opening near the posterior maxillae 

 of a crustacean ; it is widely distributed among Ento- 

 'tostraca. It acts as a renal organ. S., Hearing, a 

 nail concave plate used to concentrate the sound- 

 waves in the ear. 



sllac [shel'-ak). See Lac. S. Cement. See 

 Cement. 



slls [shelz) [ME., schelle, shell]. Tinted spectacles, 

 or protection of the eyes. Coquilles. 

 lepherd's Purse. The Capsella bursa pastoris. A 

 common herb possessing tonic and stimulant and ac- 

 ive diuretic properties. Dose of the fluid extract 

 t xv-3J. Unof. 

 leringham Valve. See Ventilation. 



Sherry Wine [sher'-e). See Vinum xericum. 

 lerwood Oil. See Petroleum Ether. 

 ield (sheld) [ME., sheeld, shield]. I. A protective 

 structure or apparatus. 2. In biology, a protective 

 plate, scute, lorica, or carapace. S., Nipple, a protec- 

 ive covering for sore nipples. S. -shaped, same as 

 Scutate or Peltate. S., Sims', an instrument used in 

 le application of wire sutures. 

 lifting-type, Foerster's. See Foerster's. 



Shima-mushi [shi-mah-?nush' -e) [Jap.]. A Japanese 

 febrile disease supposed to be due to the bite of an 

 insect. 



Shin [ME., shinne, shin]. The anterior margin of 

 the tibia or fore-part of the leg. S.-bone, the tibia. 



Shingles [shing / -gles). A name for herpes zoster. 



Ship Fever. Synonym of Typhus Fever, q. v. 



Shiver [shiv'-er) [ME., chiveren, to shiver]. A tremor 

 or shaking of the body. It may arise from a sense 

 of coldness, but it is often concomitant with or symptom- 

 atic of fevers, especially those of an infectious nature. 



Shock (shok) [ME., schok, a shock]. The depression 

 or grave effect produced by severe injuries, operations, 

 or strong emotion. A relaxation or abolition of the 

 sustaining and controlling influence which the nervous 

 system exercises over the vital organic functions of the 

 body. It is the result of a profound impression made 

 on the cerebro-spinal axis, either directly through the 

 agency of an afferent nerve, or through the circulatory 

 medium. S., Deferred, that curious condition in 

 which the manifestations of shock, due not to severe 

 bodily injury but to purely mental causes, develop 

 after the lapse of some time from the occurrence. This 

 variety of shock may be even more profound than 

 that produced by bodily injury. S., Discharging, 

 a shock produced by a discharge of electricity. S., 

 Electric, the physiologic effect produced upon an 

 organism by the opening or closing of an electric cir- 

 cuit in which it is included. S., Epigastric, the 

 result of a blow upon the epigastrium . S., Erethismic, 

 a form of shock attended with symptoms of excitement. 

 S., Fetal, the sensation produced by movements of 

 the fetus in utero. S., Railway, the mental impres- 

 sion produced by a railway accident. S., Secondary, 

 or Insidious, a second attack occurring after the first. 

 S., Sexual, shock caused by rape or coitus. S., 

 Torpid, shock in which marked depression is a 

 prominent symptom. S., Traumatic, shock due to 

 traumatism. 



Shoddy ;hod'-e) [E. dial]. A material made from 

 fragments of cast-off woolen clothing torn into fibers 

 and re-spun into yarn. It is looser in texture than 

 mungo, which is made from remains of finer fragments, 

 such as old dress-coats, tailors' clippings, etc. S. 

 Fever or Disease, a febrile condition caused by the 

 inhalation of the dust arising in making " shoddy " 

 yarns and fabrics. It is characterized by feverishness, 



headache, nausea, dryness of the mouth, dyspnea, 

 cough, and expectoration. See Fever. 



Shoe [shu) [ME., shoo, shoe]. A covering for the foot, 

 S., Club-foot, a shoe provided with braces for the 

 correction of talipes. S. -salesmen's Disease, 

 one of the occupation -neuroses, characterized by a 

 paradoxic paralysis of muscles (anterior tibial) that are 

 placed in extreme relaxation by the movements which 

 caused and intensified the paralysis. It is produced 

 by sitting on the heels while engaged in fitting shoes, 

 the feet being sharply flexed on the legs and the legs 

 on the thigh. Degenerative changes take place in the 

 muscles or nerve-endings. S., Sayre's. See Sayre. 

 S.-and-stocking Position. See Position. S.-boil, 

 in farriery, an enlargement at the point of the elbow, 

 the result of pressure of the heels upon the spot. It 

 is also called capped elbow. 



Shone's System. See Sewage, Disposal of. 



Short [ME., short, short]. Neither long nor tall. S. 

 Breath. Synonym of Dyspnea. S. Circuit, a cir- 

 cuit in which an electric current encounters an ab- 

 normally small resistance. S. -sight. See Myopia. 



Shortening [short' '-en-i/ig) [ME., short, short]. The 

 process of making short. 



Shot [ME., shot, a shot]. A projectile, especially a 

 ball or bullet ; anything thrown forth. S.-gun 

 Prescription, one with many ingredients, written 

 with the expectation that some one may prove cura- 

 tive. S.-gun Quarantine, the extemporized and 

 unauthorized establishment of a cordon against a place 

 suspected of being the seat of an epidemic of a com- 

 municable disease. S.-silk. See Retina. 



Shoulder [shol f -der) [ME., scholdre, shoulder]. The 

 popular designation for the scapuloclavicular articu- 

 lation and adjacent parts. S. -blade, the scapula. 

 S.-girdle. See Girdle. 



Show (sho\ [ME., sche-.ve, a show]. A sar.guino-serous 

 discharge from the birth-canal prior to labor ; the first 

 appearance of a menstrual flow. 



Shower [shau'-er) [ME., shottr, shower]. A light fall 

 of rain. S.-bath. See Bath. S.-bath, Electric. 

 See Electric Shower-bath. 



Shrapnell's Membrane, the membrana flaccida ; the 

 skin-layer of the membrana tympani, with the mucosa 

 of the attic. See Membrane. 



Shreds [ME., shrede, a shred]. Patches of filmy ma- 

 terial passed with the fecal discharges in some cases of 

 enteritis and diarrhea. They may be composed of 

 false membrane, of actual sloughs from the intestinal 

 mucosa, or of flakes of hardened mucus. 



Shrivel (shriv'-l) [origin obscure]. To shrink in bulk 

 and become wrinkled. 



Shriveled (shriv'-ld) [origin obscure]. Contracted into 

 wrinkles ; corrugated. 



Shrub [shrub) [AS., scrob, a shrub]. I. Alow, branch- 

 ing, woody plant ; a bush. 2. [Arab., sharab\ A 

 drink, or cordial made of fruit-juice, often with the 

 addition of rum ; as currant, or raspberry shrub. 



Shudder [shud'-er) [ME., schuderen, to shudder]. A 

 convulsive but momentary tremor, caused usually by 

 fright, disgust, or nervous shock. 



Shunt [ME., schunt\. In electricity, a conductor of 

 low resistance, joining two points in an electric current, 

 and completing a path through which the current will 

 pass. 



Shurly-Gibbes Treatment. See Treatment, Maihods 



of- 

 Shuttle Pulse [shut'-l). See Corrigan's Pulse. 

 Siagon [si'-ag-on) [mayuv, a little jaw]. In biology, 



the mandible of a crustacean. 

 Siagonagra [si-ag-on-a' -grah) [aiayuiv, jaw-bone ; aypa, 



seizure]. Gouty pain in the maxilla. 



