EXESION 



255 



EXTIRPATOR 



Exesion (eks-e'shun) [exedere, to corrode]. The 

 gradual superficial destruction of organic parts, par- 

 ticularly bone, in consequence of abscesses and other 

 destroying agencies. 



Exhauster [eg-zazvst'-ur) [exhaurire, to pour. out]. 

 An instrument for the removal of soft cataracts. 



Exhaustibility [eg-vrtost-e-bil'-it-e). Capacity for be- 

 ing exhausted. E., Faradaic, the cessation of excitabil- 

 ity in a muscle under repealed stimulation. Cf. Reac- 

 ■ :enic. 



Exhaustion. (See Illus. Diet.) 2. The pharmaceu- 

 tic process of dissolving out one or more of the constit- 

 uents of a crude drug by percolation or maceration. 

 E., Heat, E.. Solar. See Insolation (Illus. Diet.). 

 E. Hypothesis. See under Immunity. 



Exhibition. (See Illus. Diet.) 2. The administration 

 of a remedy. 



Exinanition {eks-in-an-ish'-on) [exinanitio, an enfeeb- 

 ling]. Excessive exhaustion. 



Exocardia (eks-o-kar / -de-ah) [e^u, out; tapdia, the 

 heart]. Displacement of the heart. 



Exocystis (eks-osisf-us) [iiu, without; Kvartc, the 

 bladder]. Prolapse of the urinary bladder. 



Exogenous. (See Illus. Diet.) E. Disease. See 

 - :thy. 



Exognathion (eks-o-nath' '-e-on) [e^u, without; -j-vadoc, 

 the jaw]. The alveolar process of the superior max- 

 illa. 



Exognosis (ex-og-no'sis) [i:, out of; } tyvaoKEiv, to 

 know]. Diagnosis by exclusion. 



Exolution (eks-o-h/shun) [exolvere, to unloose]. 

 Syncope, trance. 



Exometra (eks-o-met'-rah) [ffw, outward ; uifrpa, the 

 womb]. Prolapse or inversion of the uterus. 



Exomphalia (eks-om-fa'-le-ah) [hi;, out; 6uoa/.6f, 

 navel]. Protrusion of the navel. 



Exomphalocele {eks-om-fal f -osel) [i$, out of; buoa/.6c, 

 the navel ; Kqkn, a tumor]. An umbilical hernia. 



Exomphalos. (See Illus. Diet.) 3. An individual 

 with an umbilical hernia or undue prominence of the 

 navel. 



Exoncoma (eks-ong* '-komah) [i^oynuua, anything swol- 

 len]. A protruding tumor. 



Exoncosis (ehs-on-h^sis). The formation of a promi- 

 nent tumor. 



Exopathy 1 eks-op* -ath-e) [f ;t>, out ; iradoc, disease] . A 

 disease having its origin in some cause external to the 

 organism. Syn., Exotery. 



Exorbitism (eks-orb* -it-izm). See Exophthalmos 

 (Illus. Diet.). 



Exosepsis (eks-osep 1 'sis) [e:u, outside ; sepsis']. Sepsis 

 originating outside the body. 



Exosmometer (eks-oz-mom / -et-ur) . See Endosmome- 

 ter 1 Illus. Diet.). 



Exosplenopexia, Exosplenopexy (eks-osple-no-peks 1 '- 

 e-ah, -pek/e) [e^o», without ; a-'/.ijv, spleen ; ~'/;ic, fix- 

 ation]. An operation substituted for splenectomy, 

 which consists in attaching the spleen in the abdominal 

 wound and fixing it there by its capsule. 



Exostosis. (See Illus. Diet.) Syn., Osteoncosis; 

 Osteoncus ; Osteophyte. E. apophytica, one existing at 

 the point of insertion of a tendon or fascia. E. bursata, 

 one originating in an articular surface and inclosed in a 

 cartilaginous or synovial capsule. E., Button-like. 

 See E. eburnea cltrz'ata. E., Cancellous. See E. , 

 Parenchymatous. E., Cartilaginous, one in which 



i the bony and cartilaginous elements are equal in 



I amount. E., Cauliflower, E., Cellular. See E., 

 Spongy. E., Dental, a localized or diffuse hypertro- 

 phy of the cementum of a tooth ; more correctly termed 

 hypercementosis. E. eburnea. See £., Ivory ( Illus. 

 Diet. ). E. eburnea clavata, small, round, flat growths 



on the cranium having the appearance of ivory buttons. 

 E., Epiphyseal, one located on the epiphysis of a bone. 

 E., False, an outgrowth from bone which has not the 

 nature nor the constitution of bone. E., Hyponychial. 

 See E., Subungual. E., Laminar, one made up of 

 superimposed laminas. E., Parenchymatous, a bony 

 tumor developed from the cancellous structure. E., Par- 

 osteal, one having its origin in the connective tissue. 

 E., Periosteal, one having its origin in the periosteum. 

 E. spongiosa, E., Spongy, one composed almost com- 

 pletely of spongy bone-tissue. E. steatomatodes. 

 See Osteosteatoma (Illus. Diet.). E., Subungual, E. 

 subungualis, a form originating beneath the nail. 



Exotery (eks-ot'-ur-e). See Exopathy. 



Exothermic (eks-o-thur'-mik) [e£<J, outside; Oipun, 

 heat]. I. Relating to the giving out of heat. 2. A 

 substance which gives out heat in its production. Cf. 

 Endothermic. 



Exothyropexy {eks-o-thi-ro-peks / -e) [i;<J, outside; thy- 

 roid ; ~rj~tc, fixation]. Exposing the enlarged thy- 

 roid gland by a median incision and drawing it out- 

 side. 



Exoticosymphysis (ehs-ot-ih-osim'-fesis) [i^urriK^, 

 foreign ; at uovcic, a growing together]. The union 

 of a substance or body with the organism. 



Exotospore (eks-o*-tospdr) [e^orriKo^, outward ; o— opoc, 

 seed]. E. Ray Lankester's term for the malarial 

 germ which i3 brought by the stab of the mosquito 

 (Anopheles) into the human bloodvessels ; it is so 

 named from being formed outside the human body. 



Experiment. (See Illus. Diet.) E., Balancing. 

 See under Goltz (Illus. Diet. 1 ). E., Check, E.. Control. 

 See under Control ( Illus. Diet.). E., Croaking. E., 

 Embrace, E., Goltz's. See under Goltz (Illus. 

 Diet. <. E., Dropping. See Herings £. (Illus. Diet). 

 E., Miiller's. I. See Valsalva's Experiment (Illus. 

 Diet. ). 2. See Test, Valsalva's. E., Passive, one in 

 which the conditions are determined by nature and the 

 observer simply notes what is occurring. E., Pfeiffer's. 

 See Reaction,Pfei J ff'er , s. E., Rinne's. See Test, Rinnf s. 

 E., Stenson's. See under Stensen (Illus. Diet.). E., 

 Torricelli's, one designed to show the amount of atmos- 

 pheric pressure by means of a cistern barometer. 



Expression. (See Illus. Diet) E., Crede's Method of. 

 See E. of the Placenta (Illus. Diet. ). E., Rectal, assist- 

 ing the expulsion of the fetal head by means of two 

 fingers inserted into the rectum and hooked into the 

 mouth or under the chin. 



Exsanguinate (ek-sang' '-gwin-dt) [ex, priv.; sanguis, 

 blood]. 1. To render bloodless. 2. Bloodless. 



Exsection (ek-sek / -shun). See Excision (Illus. 

 Diet.). 



Exsertor (ek-surt'-or) [exserere, to protrude]. A mus- 

 cle which protrudes a part. 



Extasis (ek' -stasis). See Ecstasy (Illus. Diet). 



Extension. (See Illus. Diet.) E., Buck's. See 

 Bucks Apparatus (Illus. Diet). 



Extensometer (eks-tenson/-et-ur) [extendere, to stretch 

 out; met rum, measure]. A micrometer to measure 

 the expansion of a body. 



Exterioration (eks-te-re-or-a' shun) [exterior, outer]. 

 The faculty of mind by which the image of an object 

 seen is referred to the real situation of the object. 



Externalize (eks-tur'-nal-iz) [externus, external]. I. 

 In psychology, to transform an idea or impression which 

 is on the percipient's mind into a phantasm apparently 

 outside him. 2. To refer to some outside source, as 

 the voices heard by the subject of psychomotor hal- 

 lucinations. 



Extirpator (eks-tur-pa' -tor) [extirpare, to root out]. 

 An instrument for extracting the roots of cuspid 

 teeth. 



