DYS 



402 



DYSMENORRHEA 



impart a velocity of one centimeter per second to a 

 mass of one gram. See Electric Units. 



Dys- [due-,] a prefix implying difficulty, illness, bad- 

 ness ; it may be represented by bad, hard, difficult, 

 painful. 



Dysacousma (dis-ak-ooz' '-ma/i) [fog, painful ; dnovaia, 

 hearing]. A sensation of pain or discomfort caused 

 by loud or even moderate noises. 



Dysacusia, or Dysacousis (dis-ak-oo' '-ze-ah or -sis) 

 [due, hard; anovaia, hearing]. Hardness or difficulty 

 of hearing. 



Dyssesthesia (dis-es-the* '-ze-ah). See Dysesthesia. 



Dysalbumose (dis-aF-bu-moz). See Albumose. 



Dysanagnosia (dis-an-ag-no f -ze-ah) [fog, hard ; avay- 

 vaaig, recognition, reading]. Word-blindness; dys- 

 lexia. 



Dysaphe (dis'-af-e) [fog, painful; a<pi], touch]. Mor- 

 bid state of the sense of touch. 



Dysapocatastasis (dis-ap-o kat-as' -tas-is) [fog, hard ; 

 cnroKaTaaTacng , reestablishment] . Morbid restlessness 

 and dissatisfaction. 



Dysaponotocy (dis-ap-o-not 1 '-o-se) [fog-, difficult; ano- 

 vog, painless; rdnog, birth.]. Painless, but difficult, 

 labor. 



Dysarthria (dis-ar' -thre-ah) [due-, difficult ; apOpov, 

 articulation]. Impairment of the power of speech- 

 articulation, from disease of the medulla and pons. 

 D. literalis. Synonym of Stammering. 



Dysarthrosis (dis-ar-thro' '-sis) [due-, bad ; apOpov, a 

 joint]. I. A deformed joint. 2. A false -joint. 3. 

 A dislocation of a joint. 



Dysbasia (dis-ba' -ze-ah) [fog-, difficult; fiaaig, a step] . 

 Difficulty of walking. (Proposed instead of abasia, 

 as in the affection there is rarely absolute inability to 

 walk.) 



Dysbulia (dis-bu' -le-ah) [due-, difficult; (3ob XtoQat, to 

 will]. Impairment of will-power. 



Dyscataposis (dis-kat-ap' -o-sis). Synonym of Hydro- 

 phobia. 



Dyschroa, or Dyschrcea (dis f -kro-ah or -kre'-ah) [fog-, 

 bad; XP°^> color]. Discoloration, especially of the 

 skin. 



Dyschromatopsia (dis-kro-mat-op' '-se-ah) [fog-, ill ; 

 Xputia, color; 6ipig, vision]. Difficulty in distin- 

 guishing colors. 



Dyschromia (dis-kro' '-me-ah) [fog-, ill ; ^pu/za, color]. 

 Discoloration, especially of the skin. 



Dyschylia (dis-ki' -le-ah) [fog-, ill; ^uAdf, chyle]. 

 Disorder of the chyle. 



Dyscinesia (dis-sin-e' '-ze-ah) [fog-, ill ; nivr/aig, mo- 

 tion]. Difficult or painful motion. 



Dyscoria (dis-ko' -re-ah) [fog-, bad; nopt/, pupil]. Ab- 

 normality of the form of the pupil. 



Dyscrasia {dis-kra' -ze-ah) [_(hg-, bad; npaaig, combi- 

 nation] . A depraved or abnormal state ; an abnor- 

 mal or impure condition of the blood, due to general 

 disease. 



Dyscrasic, Dyscratic (dis-kraz'-ik, dis-krat' -ik) [due-, 

 bad ; xprimg, combination]. Of the nature of, or af- 

 fected with a dyscrasia. 



Dyseccea, or Dysecoia [dis-es-e'-ah, or dis-ek-oi'-ah) 

 [ovorfKOta, deafness]. Hardness of hearing. 



Dysenteria (dis-en-te r -re-ah) . See Dysentery. D. 

 splenica. Synonym of Melena. 



Dysenteric (dis-cn-tcr'-ik) [<Juf-, bad ; brrepov, the 

 bowels]. ( )f the nature of or affected witli dysentery. 



Dysentery (dis'-en-ter-e) [due-, bad ; ivrepav, the 

 bowels]. An acute specific disease marked by inflam- 

 mation of the solitary glands and follicles of the large 

 intestine, with tormina and tenesmus, and the frequent 

 passage of scanty and bloody StooU. Death may 

 result from asthenia, or peritonitis from perforation. 



Toward the close of grave cases of the disease the 

 stools may become watery, black (the so-called "meat- 

 washings"), and of an offensive gangrenous odor. 

 Dysentery is prevalent in all malarious regions, and is 

 also likely to occur among troops when the food is 

 poor and irritating, and the drinking-water impure. 

 D., Algid, that form characterized by great feebleness 

 or absence of the pulse-beat, cyanosis, aphonia, sup- 

 pression of urine, cold surface, and an early fatal 

 issue. D., Amebic, that in which the Ameba coli is 

 found in the stools. D., Hemorrhagic, a gr?ve 

 bowel-disease in India, marked by profuse hemor- 

 rhages from the bowels, with collapse. D., Sporadic, 

 a mild type occurring in temperate climates. D., 

 White, an epidemic variety, with mucopurulent 

 stools. 



Dysepulotic (dis-ep-u-lot'-ik) [due-, bad ; errovluTiiidg , 

 healing]. Cicatrizing slowly and imperfectly. 



Dysesthesia (dis-es-the' -ze-ah) [6vg- , difficult ; alaOrjaig, 

 sensation]. Dulness of any sensation, especially that 

 of touch. 2. Painfulness of any sensation not nor- 

 mally painful. D. interna, amnesia. D. receptiva, 

 pain or distress felt in the vertex or occiput, often with 

 a feeling " as if the head were being opened and shut." 



Dysgenesis [dis-jen' -es-is) [fog-, hard; yevecug, genera- 

 tion]. In biology, the second of Broca's four degrees 

 of fecundity — in the union of two species. Cf. Agene- 

 sis, Paragenesis , Eugenesis. 



Dysgeusia (dis-ju' '-se-ah) [due-, ill ; yevaig, taste]. 

 Morbidity or perversion of the sense of taste. 



Dysgrammatism (dis-gram' -al-izm) [due-, difficult; 

 ypd/ufia, a letter]. Inability to make the proper use of 

 words. It is a symptom of certain cerebral diseases. 



Dysgraphia (dis-graf -e-ah) [due-, difficult ; ypdtpeiv, 

 to write]. 1. Inability to write, as a result of a brain- 

 lesion. 2. Imperfect configuration of an organ. 



Dyshidrosis (ilis-hid-ro'-sis). See Dysidrosis. 



Dysidrosis (dis-id-ro'-sis) [fog-, bad ; lopuaig, sweat- 

 ing]. Excessive activity of the sweat-glands, in asso- 

 ciation with a retention of their secretion, probably 

 due to some neurotic disorder. See Chiropompholyx, 

 Pompholyx . 



Dyskinesia (clis-kin-e' -se-ah) [fog-, difficult ; nivrjaig, 

 movement]. Impairment of the power of voluntary 

 motion. See Discinesia. 



Dyslalia (dis-la' -le-ah) [fog-, difficult ; la"kelv, to talk]. 

 Impairment or difficulty of speaking, due to some 

 non-central lesion (such as a defect of the vocal bands 

 or of the palate). 



Dyslexia (dis-leks'-e-ah) [fog-, difficult ; 3if<c, read- 

 ing]. Morbid or aphasic difficulty or fatigue in read- 

 ing. 



Dyslochia (dis-lo f -ke-aJi) [fog-, bad ; Ad^wi, the lochia]. 

 An abnormal condition of the lochial discharge. 



Dyslogia (dis-lo f -je-ah) [fog-, difficult; s.dyog, speech]. 

 Difficulty in speech, not so much with individual 

 words as with the expression of ideas ; it is due to 

 some central lesion. See also Alogia. 



Dyslysin (dis'-lis-in) [fog-, difficult ; avfiv, to dissolve], 

 C M H 9g 3 . A resinous anhydrid of cholalic acid. It 

 is insoluble in water, alcohol, and alkalies. It is a 

 non-crystalline substance soluble in an excess of ether. 



Dysmenorrhea [dis-men-or-e'-ah) [for , difficult; uijv, 

 month; freei.v, to flow]. Obstructed or difficult men- 

 struation. D., Congestive, a form of painful men- 

 struation in which often no lesion can be found, the 

 pain being due to an intense congestion of the pelvic- 

 viscera. In other cases there exists some morbid con- 

 dition that is aggravated by the menstrual congestion. 

 D., Intermediate, pain occurring regularly each 

 month, but not at the menstrual period. D., Me- 

 chanical. See D., Obstnu tire. D., Membranous, 



