EXOMPHALOS 



452 



EXPIRATORY 



Exomphalos (eks-om' -fal-os) [ef, out; bp.<pa%6g, navel]. 

 Undue prominence of the navel ; also, umbilical 

 hernia. 



Exoneural (eks-o-nu' -ral) [e^u, out; vevpov, nerve]. 

 Occurring or situated outside of the nervous appa- 

 ratus. 



Exopathic (eks-o-path' '-ik) [k^u, out ; irddog, disease]. 

 Pertaining to those causes of disease coming from 

 without or beyond the organism. See, also, Endo- 

 pathic. 



Exoperidium (eks-o-per-id' -e-uni) [££w, outside ; peri- 

 dium (from nrjpidiov, dim. of ni/pa, a leather pouch), 

 the covering of the spore-case]. The outer peridium 

 of a fungus having more than one, as the earth-star. 



Exophoria (eks-o-for'-e-ah). See Heterophoria. E., 

 Pseudo-, an outward tending of the eyes excited by 

 lessening the activity of the accommodative centers, as 

 when hyperopia has been corrected by convex lenses. 

 This condition also exists in uncorrected myopia. 



Exophthalmic (eks-off-thaV '-mik) [gf, out; btydaAfibg, 

 eye]. Pertaining to exophthalmos. E. Goiter. See 

 Goiter. 



Exophthalmometer (eks-off-thal-mom' -et-er) [if, out ; 

 b(p6aA/j,6g, eye; fierpov, measure]. An instrument 

 for measuring the degree of exophthalmus. 



Exophthalmos, Exophihalmus (eks-off-tha/'-mos^mus) 

 [ef, out ; bipdaA/idg , eye]. Abnormal prominence or 

 protrusion of the eyeballs. E., Pulsating, that 

 characterized by a bruit and pulsation, due to an aneu- 

 rysm that pushes the eye forward. 



Exoplasm (eks' -o-plazm) [e£«, outside ; TcAaoaeiv, to 

 form]. In biology, the outer protoplasm of a unicellu- 

 lar organism or histologic cell. 



Exopodite (eks-op' -o-dit) [efu, outside ; 7roi'c (nod-), 

 foot]. In biology, the outer of the two main divi- 

 sions of the typical crustacean limb or appendage. 

 Cf. Endopodite and Basecphysis. 



Exorhinus (eks-or-i' -nus) [efw, without; peg, nose]. 

 Lissauer's term for a skull in which the angle between 

 the lines joining the nasion and the alveolar point and 

 rhinion is between i° and 20. 5 . 



Exormia (eks- or' -me- ah) [ffop/zdetv, to go forth]. Any 

 papular skin-disease. 



Exoskeleton (eks-o-skel' -et-un) [ef w, outside ; okeA£t6v, 

 a dried body]. In biology, the outer envelop of many 

 of the lower forms of life for the protection and 

 attachment of organs, representing an integument 

 modified by the deposition of chitin, lime, or other 

 hardening substance. See Dermoskeleton. 



Exosmose (cks'-os-mos). See Exosmosis. 



Exosmosis (eks-os-mo' -sis) [ef, out; uap,6g, thrust]. 

 Outward osmosis. See Endosmosis and Osmosis. 



Exosmotic (eks-os-motf -ik) [ef , out ; ua/idg, thrust]. 

 Pertaining to or characterized by exosmosis. 



Exospore (eks f -o-spor) [ffw, outside ; otrdpog, seed]. 

 In biology, the outer coat of a spore. 



Exostome (eks'-os-tom) [efw, outside; arb/ia, mouth]. 

 In biology, the orifice in the outer coat of the ovule, 

 or the outer peristome of a moss. 



Exostosis (eks-os-to'-sis) [ef, out; barkov, bone]. 

 Abnormal , enlargement or growth of bone, especially 

 a deposit of bony tissue upon the surface of a pre- 

 existing bone. E. of the Teeth, exostosis den- 

 tium ; exodontosis. An outgrowth from a tooth. 

 The only part of a tooth subject to exostosis is the 

 root, and the development of the affection usually 

 commences at or near the extremity ; extending from 

 thence upward, it sometimes covers a greater or less 

 portion of the external surface. E., Ivory, a bony 

 outgrowth of extreme hardness and of small size, 

 rarely exceeding that of a small walnut. It springs 

 usually from the exterior of one of the cranial bones. 



Histologically, it is marked by the absence of Haver- 

 sian canals. 



Exostotic (eks-os-tot'-ik) [ef, out; bareov, bone]. Of 

 the nature of exostosis. 



Exoteric (eks-o-ter' '-ik) [h^urepiKbg, external]. Synony- 

 mous with Exopathic. 



Exoterorhinus (eks-o-ter-or-i' -nus) [efoirepoc, outside ; 

 pig, nose]. Lissauer's term for a skull in which the 

 angle between the lines joining the nasion and the 

 alveolar point and rhinion is between 22. 5 and 45 . 



Exotheca (eks-o-the'-kah) [£fw, outside ; di/icq, a case]. 

 In biology, the proper calcareous investment of the 

 visceral chamber of a coral. 



Exothecium (eks-o-tlie' -se-uni) [efw, outside ; Ot/ktj, a 

 case]. In biology, the epidermis of the anther. 



Exothyropexy ( eks-o-thi' '-ro-peks-e ) [ i^u, without ; 

 dvpedg, a shield; iryi;ig, fixation]. Partial extrusion 

 of goiter, with subsequent atrophy from constriction, 

 cicatrization, etc. 



Exotic (eks-ot'-ik) [e^orrmog, foreign]. Pertaining to 

 plants and products from another country. 



Exotropia (eks-o-tro* -pe-ah). See Strabismus. 



Expansive (eks-pan f -sif) [expandere, to spread out]. 

 Comprehensive ; wide-extending. E. Delirium, 

 insane over-estimation of one's mental or bodily 

 powers. See Exaltation. 



Expectant (eks-pek' '-tant) \expectare, to look out for]. 

 Awaiting or expecting ; applied to a plan of treatment 

 consisting in watching the progress of a disease, and 

 not interfering with therapeutic measures, unless war- 

 ranted by special symptoms. 



Expectation (eks-pek-ta' '-shun) [expectare, to expect]. 

 Same as Expectant. E. of Life, the average num- 

 ber of years that persons of a given age, taken one 

 with another, live, assuming that they die according 

 to a given table of the probabilities of life. It thus 

 has no relation to the most probable life of a single 

 given individual. E. of L., Complete, the addition 

 of one-half year to the curtate expectation to allow 

 for that portion of a year lived by each person in the 

 year of his death. E. of L., Curtate, the average 

 number of whole or completed years lived by each 

 person. 



Expectorant (eks-pek' -to-rant) [ex, out ; pectus, breast]. 

 I. Promoting expectoration. 2. A remedy that pro- 

 motes expectoration. 



Expectoration (eks-pek-tor-a' -shun) [ex, out ; pectus, 

 breast]. 1. The ejection from the mouth of saliva or 

 material brought into it by the air-passages. 2. The 

 fluid or semi -fluid matters from the lungs and air pas- 

 sages expelled by coughing and spitting. E., Prune- 

 juice. See Prune-juice. E., Rusty. See Rusty Ex- 

 pectoration. 



Expellent (eks-pcV '-ent) [expel/ere, to drive out]. A 

 medicine that has power to expel a materies morbi. 



Experiment (eks-per f -im-ent) [experimental, to ex- 

 periment]. A trial or test. 



Experimentum (eks-per-im-en' '-turn) [L.]. Same as 

 Experiment. E. mirabile of Kirchner, a hyp- 

 node phenomenon in animals, a hen, e.g., remaining 

 in a fixed position when the head is pressed down and 

 a chalk line made from its beak. 



Expert (eks' -pert) [expertus, proved]. A person es- 

 pecially qualified in a science or art. E., Medical, 

 a physician peculiarly fitted by experience or special 

 learning to render an authoritative opinion in medico 

 legal or diagnostic questions. 



Expiration (eks-pi-ra' '-shun) [expirare, to breathe out]. 

 The act of breathing forth, or expelling air from the 

 lungs. 



Expiratory (eks-pi'-rat-or-e) [expirare, to breathe out]. 

 Relating to or concerned in the expiration of air. 



