DISTOCIA 



393 



DOCIMASY 



others will follow in the order of their boiling-points. 

 In cases in which the boiling-points are close, the 

 action of one substance upon another often prevents 

 exact separations. 



Distocia {dis-to' -se-ah) [tfic> double; tokoc, birth]. 

 Delivery or birth of twins. 



Distoma (dis-to' -mah), or Distomum {dis-tc/-mum) 

 [(5/c, double; ardfia, a mouth]. A genus of trema- 

 tode worms. See Parasites {Animal}, Table of. 



Distomiasis {dis-to-mi' '-as-is) [Sic, double ; ardua, 

 mouth]. The symptoms produced by the presence of 

 certain trematodes or flukes in the human system. 



Distomum {dis-to' -mum) [dig, double; aroua, mouth]. 

 Same as Distoma. See Parasites {Animal), Table of. 



Distomus {dis-to' -mus). See Diprosopus. 



Distortion {dis-tor* -shun) [distorquere , to distort]. I. 

 A twisted or bent shape ; deformity or malformation, 

 acquired or congenital. 2. A writhing or twisting 

 motion, as of the face ; a grimace. 



Distortor oris {dis-tor* -ter o'-ris) [L., " the distortor of 

 the mouth " ] . The zygomaticus minor muscle. See 

 Muscles, Table of. 



Distribution {dis-trib-u' -shun) [distribuere, to distri- 

 bute]. The branching of a nerve or artery, and the 

 arrangement of its branches within those parts that it 

 supplies. 



Distrix {dis'-triks) [d/c, two; dpi!;, hair]. The splitting 

 of the distal ends of the hair. 



Disulphate {di-sul' -fat) [&,two; sulphur]. In chem- 

 istry, an acid sulphate. 



Disulphone {di-sul' -fon) [dis, double; sulphur"]. 

 One of the solid, crystalline, very stable compounds, 

 produced on oxidizing the di-thio- ethers or thio-acetals 

 with a permanganate solution. The disulphones are 

 not attacked by acids or alkalies. 



Disuse-amblyopia. See Argamblyopia. 



Disvulnerability {dis-z nl-ner-ab-il' -it-e) [dis, neg. ; 

 indnerare, to wound]. The power of abnormally 

 rapid recovery from wounds, said to be a peculiarity 

 of many criminals. 



Dita Bark {di'-tah) [L.]. The bark of Alstonia scho- 



(laris, native to the Philippine Islands. It is employed 

 as a tonic and antiperiodic in intermittent fever. 

 Dose of the tincture, 3 j-ij ; of the fluid extract, gtt. 

 ij-v ; of the powder, gr. v. Unof. 

 Ditain {dit'-a-in) [Dita] , C M H w N 2 0. An alkaloid of 

 Dita, occurring as a yellow amorphous substance. 

 Ditamin (dif-am-in). Same as Ditain. 

 Ditana digitifolia {dit-a'-nah dij-it-ifc/ -le-ah) [L.]. 

 A Mexican plant said to possess galactagogue proper- 

 ties. The existence of such a plant has been ques- 

 tioned. 

 Dithecal {di-the'-kal) [die, two; drjKq, a case]. In 



biology, having two thecas or anther-cells. 

 Ditokus (dit'-o-kus) [Jtc, two ; reiceiv, to bring forth]. 

 In biology, giving birth to twins, or laying two eggs. 

 Ditrichotomous {di-trik-of -o-mus) [dig, two ; Tpi%a, 

 threefold ; reuveiv, to cut]. In biology, divided into 

 twos and threes. 

 Dittany {dit'-an-e) [American]. See Cunila mariana. 

 Dittel's Operation. See Operations, Table of. 

 Dittopsia {dit-top/ -se-ah). Synonym of Diplopia. 

 Dittrich's Plugs. Masses of granular matter, degene- 

 rated epithelium, and crystals of the fatty acids (chiefly 

 butyric acid) plugging up the ends of the bronchial 

 tubes in cases of gangrene of the lung. They are 

 yellowish-brown in color, of very fetid odor, and 

 vary in size from a millet-seed to a bean, 

 iuresis {di-u-re' -sis) [6 id, through ; ovpieiv, to make 

 water] . Abnormal increase in the secretion of urine, 

 iuretic {di-u-ret'-ih) [did, through ; ovpieiv, to make 

 water]. I. Increasing the flow of urine. 2. A 



medicine that increases the secretion and flow of 

 urine. 



Diuretin {di-u-re' -tin) [did, through ; ovpieiv, to make 

 water], C-H.XaX 4 0,,C ? H 4 OHCOOXa. Theobromin 

 sodio-salicylate, containing 50 per cent, of theobromin 

 salicylate. It has been found useful as a diuretic in 

 pleuritic effusion and cardiac dropsy. Dose 90 grains 

 daily, in 15-grain doses. 



Diurnule (di-um'-ul) [Fr.]. A form of medicinal tablet 

 that contains the maximum quantity of a toxic drug 

 that may be administered to an adult in 24 hours. 



Divagation {di-vag-a' -shun) [divagatio, a wandering]. 

 Incoherence of speech or thought. 



Divalent {di'-val-ent) [Sic, twice; valens, having 

 power]. Having power to combine with two mono- 

 valent atoms, as a chemic compound. Thus, the 

 oxygen atom and the radical CH 2 are divalent. 



Divaricatio palpebrarum {di-var-ik-a' -she-o pal-pe- 

 bra'-rum). Synonym of Ectropion. 



Divergent {di-ver' -jent) [divergere, to diverge]. Mov- 

 ing in different directions from a common point. D. 

 Strabismus. See Strabismus. 



Divers' Disease. An affection similar to Caisson- 

 disease, q. v. , common in deep-water divers. D. 

 Paralysis. See Caisson-disease. 



Diverticulum (di-ver-tik' -u-lum) [divertere, to turn : 

 pi. , Divertiada]. I. A small cul-de-sac or pouch ; an 

 offshoot from a main structure ; an organ supposed to 

 be a place of lodgment for superfluous blood. 2. 

 Variation from a normal structure ; malformation. 

 D., Meckel's, a sacculation of the ileum, owing to 

 the non-obliteration of the vitelline duct. 



Divi-divi {div'-e-div'-e) [S. Amer.]. The seed-pods 

 of Ccesalpinia coriaria, a. small tree found in South 

 America. The pods are about three inches long, 

 brownish in color, and generally bent, by drying, 

 into the shape of the letter S. They contain 30 to 

 50 per cent, of a peculiar tannin somewhat similar 

 to that of valonia, but liable to fermentation. Thev 

 are used in leather-manufactures. 



Division {div-izh' -mi) [divisio, a dividing]. Surgical 

 section into two or more parts ; separation into two or 

 more parts, such as occurs in certain cell-nuclei. 



Divulsion {di-vul'-shun) [dizmlsio, a tearing apart]. 

 The surgical or traumatic division of any part by tear- 

 ing it asunder. 



Divulsor {di-vul'-sor) [L.]. An instrument for effect- 

 ing surgical divulsion, especially of a urethral stric 

 ture. 



Dizziness {diz'-e-nes). See Vertigo. 



Dobell's Spray, or Solution. Liquor sodii boratis 

 compositus (N. F.) ; a solution of borax, sodium bicar- 

 bonate, and carbolic acid in glycerin and water ; it 

 is valued as a spray for nasal and throat troubles. 



Dobie's Line, or Stripe. See Lines, Table of. 



Dochmiasis {dok-mi' -as-is) [ddx/uoc, crumpled]. The 

 diseased condition caused by the presence in the body 

 of parasites belonging to the genus Dochmius. Cf. 

 A nkylostom iasis. 



Dochmius {dok' -me-us) [ddxfuoc, crumpled]. In biol- 

 ogy, a genus of thread-worms of the family Strongy- 

 lidae. See Parasites {Animal), Table of . 



Docimasia {dos-im-a' -se-ah) [doiufiaaia ; doKi/idZeiv, 

 to examine]. I. Examination, especially a post- 

 mortem examination. 2. A test, especially a chemic 

 test, of poisons. 3. In pharmacy, the testing or 

 assaying of medicines. D. pulmonum. a mode of 

 determining whether a child has or has not been born 

 alive, by examination of the lungs. 



Docimastic {dos-im-as'-tik) [doiuuaoia ; doKiudCeiv, to 

 examine]. Making use of tests ; testing; proving. 



Docimasy {dos'-im-as-e). See Dosimasia. 



