DELITES< ENCE 



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DENDR1 1 [C 



tremor, great exhaustion, distressing illusions and 



hallucination.-. D. vigilans. See D. tr, mens. 



Delitescence [del-it-es' -ens) [delitescere, to lie hid]. 

 The sudden disappearance of inflammation by resolu- 

 tion. Also, the period of incubation of the virus of 

 contagious diseases, such a- smallpox, etc. 



Delivery [de-la/ -er-e) [It., dilivrer; deliberare, to set 

 free]. Parturition, childbirth. D., Post-mortem, 

 the birth of a fetus after the death of the mother, 

 from an accumulation of gases in the uterine cavity. 



Delomorphous [del-o-mor' -fus) [dffkoq, conspicuous; 

 (lopfrfj, form]. With open or conspicuous form. D. 

 Cells of Rollet, collections of large, oval, or angular, 

 well-defined, granular, reticulated, nucleated cells, 

 between themembrana propria and the adelomorphous 

 cells of the fundus glands of the gastric mucous mem- 

 brane. They are called, also, Parietal Cells of 

 Heidenhain, or Oxyntic Cells of Langley. 

 secretory part of the tubes is lined by cells called 

 Adelomorphous, Central, or Principal Cells. 



Delore's Operation. See Operations, Table of. 



Delpech's Operations. See Operations, Table of. 



Delphin ( iel'-fin). Same as Delphinin. 



Delphini Oleum [del-fi' '-ni o' '-le-um) [!-■]• The oil of 

 the common porpoise, Phocana communis. It is said 

 to have all the medicinal virtues of cod-liver oil, 

 without the disagreeable qualities of the latter. 



Delphinin [del' '-fin-in) [6e\<j>iviov, larkspur], C, 4 1 1 , r> - 

 N0 2 . A poisonous alkaloid from Staphisagria. See 

 Staphisagria. 



Delphinium [delfin'-e-um). See Staphisagria. 



Delphinoidin [dcl-fin-oid'-in ) [&tktyivwn>, larkspur; 

 eldoc, like]. An amorphous alkaloid derived from 

 Stavesacre. 



Delphisin^/'-zlf-zw) [Stkfyivuov, larkspur], C 54 II 4 , ; \',< > 8 . 

 An alkaloid of Stavesacre occurring in crystalline tuft-. 



Delta {del' -tali) [Sefca, the fourth letter of the Greek 

 alphabet]. The vulva, from its triangular shape. D. 

 mesoscapulae, the triangular area at the root of the 

 spine of the scapula. 



Deltidium [del-tid r -e-um\ [the Greek letter A, Sk"Kra\. 

 In biology, applied to the triangular space on a brach- 

 iopod shell, between the beak and the hinge. 



Deltoid {del'-toid) [delta, the Greek letter A; eldoq, 

 likeness] . Having the shape of a delta, or a triangular 

 form, as the D. Muscle. See Muscles, Table of. 



Delusion (de-lu' -zhun) \_de, from; lusus, play]. A 

 false judgment of objective things, as distinguished 

 from illusion and hallucination. It is the result of an 

 abnormal condition of the brain. A delusion may be 

 systematized or unsystematized, the former being the 

 more serious and met with in the chronically insane. 



Delusional [de-lu' '-zAun-al) [deludere, to delude]. Of 

 the nature of a delusion ; characterized by delusions. 

 D. Stupor. See Insanity, Confusional. 



Demarcation [de-mark-a' '-shun) [demarcare, to set the 

 bounds of]. A line of separation, as between gan- 

 grenous and healthy tissue. 



Demarquay's Operation. See Operation.;. Tabl 



Demembration [de-mem-bra' '-shun) [demembrare, to 

 deprive of a limb or limbs]. The cutting off of a 

 member; amputation: castration. 



Dement (de / -ment) [demens, insane]. An insane per- 

 son ; one who is demented. 



Dementia (de-men' -she-ak) [de. out of; mens, the 

 mind]. A mild form of insanity marked by imper- 

 fect conception, illogical sequence of expression, loss 

 of reflection, and impaired perception. There is par- 

 tial loss of self-control ami self-respect. Dementi;', i- 

 often a final stage of other forms of insanity. It is 

 described under the various forms of secondary, 

 senile, organic, and alcoholic. There is a general 



atrophy of the brain -ubstance, with a compensatory 

 thickening of the bram membranes, and an increase 

 ■ ■I the fluid of tin- brain and of the neuroglia. 



Demersal, or Demersed [de-mer'-sal, or de-merst f ) 

 [dtmersus, plunge into]. In biology, growing beneath 

 the surface of water, as the egg- ot the- catfish. 



Demi- A Latin prefix denoting one-half. 



Demilune Cells dm' Inn z) [demiius,hal(; luna, 

 moon]. See Cell. D. C. of Adamkiewicz. A. pecu- 

 liar form of nerve-corpuscle lying below the neuri- 

 lemma ol medullated nerve-fibers; il is stained yellow 

 by safranin. D. C. of Heidenhain. half-moon shaped 

 lies lying between the cell-, and the membrana 

 propria of the alveolus in the salivary glands. 



Demimonstrosity [dem-e-mon-stros' '-it-e) [demi, half; 

 monstruosus, monstrous]. A variety of congenital 

 deformity that doe- not give rise to appreciable dis- 

 ler of function. 



Demme, Bacillus and Micrococcus of. See Bac- 

 teria. Synonymatic '/'able of. 



Demnia [dem f -ne-ak) [fie/iviov, a bed]. In biology, 



subgenital cavities found in the Discomedusw ; 



they are also called respiratory cavities, genital cavi- 



ties, umbrella-cavities of the reproductive organs; 



infundibula subgenitalia . 



Demodex (dem'-o-deks) [At}/i6c, fat; d#f, an insect]. 

 A genus of parasitic insects. D. folliculorum, a 

 minute parasite found in the sebaceous follicles, par- 

 ticularly of the face. It probably does not produce any 

 symptoms, though in large numbers it may produce 

 acne. See Cow,,/,', also Parasites [Animal), 'Table of. 



Demography ( de-mog* '-ra-fe) \ ir, the people ; 

 ypafeiv, to write]. The science of peoples collectively 

 considered; social science, including that of vital sta- 

 tistics and the consideration of various questions of 

 state medicine. 



De Moivre's Hypothesis. An hypothesis that the de- 

 crements of population are in arithmetic proportion, 

 and that of every S6 persons born, one dies uniformly 

 every year until all are extinct. 



Demonolatry [de-mon-ol' '-at-re) [Saiuuv, a demon ; Juxr- 

 . worship]. Insane or delusional worship of devil- ; 

 the morbid assumption of the character of a witch. 



Demonomania (de-mo-no-ma' -ne-ah) [6ai/iwv, a devil; 

 fiaum, madness]. A form of madness in which a 

 person imagines himself possessed of a devil. 



Demonomaniac [de-mo-no-ma / -ne-ak) [fiaiuwv, a 

 devil ; fiavia, madness]. One who suffers with demo- 

 nomania. 



Demonopathy [de-mon-op' -a-the) [ Sal/iuv, a demon ; 

 . disease]. Same as Demonomania. 



Demonstrator [dem' ' -on-stra-tor) [ demonstrare, to 

 show]. One who instructs in the practical application 

 of the arts and scien 



De Morgan's Operation. See Operations, Table of. 



Demours, Membrane of. See Descemet ' s Membrane. 



Demulcent [de-mul' '-sent) [demulcere, to smooth]. I 

 Soothing; locally softening and lenitive. 2. Any 

 substance that protect- the mucous membranes. It i- 

 generally of a mucilaginous nature. 



Demutization [de-mu-tiz-a' -shun) [de, not; .mutus, 

 dumb]. The education of deaf-mutes to speak and 

 to understand spoken language by the movement of 

 the lips, -igns, etc. 



Denan's Operation. See Operations. Table of. 



Denarcotized [de-nar 4 '-ko-Rzd) [de, priv.; vapnun 

 narcotic]. Having the narcotin removed, as opium. 



Dendritic, or Dendroid (den-drit'-ik, or den'-droid) 

 [Set . i tree]. Tree-like or 



arborescent. The arrangement of the structures that 

 make up the arbor -'it,,- of the cerebellum, or that of 

 the uterus, is dendritic. 



