ECTOPARASITE 



409 



ECZEMA 



Ectoparasite (ek-to-par* '-as-it) [e/croc, outside; irapa- 

 oitoc, a parasite]. In biology, a parasite that lives on 

 the exterior of its host. 



Ectoparasitic (ek-to-par-as-it' -ik) [ektoc, out ; irapa- 

 atroc, a parasite]. Of the nature of or pertaining to 

 an ectoparasite. 



Ectopatagium {ek-to-pat-aj' -e-uni) [f/cro?, outside ; 

 irarayeiov, the border of a garment]. In biology, 

 that part of the wing-membrane or patagium of a bat 

 which is limited to the manus ; it is also called dacty- 

 lopatagium. 



Ectophyte (ek' -to-fit) \iKxoc, out ; fvrov, a plant]. An 

 external parasitic plant-growth. 



Ectophytic (ek-to-fif '-ik) [«roc, out ; dvrov, a plant]. 

 Of the nature of or pertaining to an ectophyte. 



Ectopia (ek-to'-pe-ah) [ekto-oc, displaced]. An ab- 

 normality of position. E. cordis. See Ectocardia. 

 E. lentis, dislocation or congenital malposition of the 

 crystalline lens. E. OCuli, abnormal position of the 

 eyeball in the orbit. E. testis, abnormal position of 

 the testicle. E. vesicae, protrusion of the bladder 

 through the wall of the abdomen. 



Ectopic \ek-topZ-ik) [Iktotcoc, displaced]. Pertaining 

 to ectopia; displaced. See also Teratism. E. Ges- 

 tation. See Gestation. 



Ectoplasm (ek' ' -to-plazni) [e/cror, without ; i?/.aooeiv, 

 to form]. In biology, the outer, hyaline, more com- 

 pact layer of protoplasm in a cell or unicellular or- 

 ganism, as distinguished from the granular endoplasm. 



Ectopy (ek'-to-pe). Same as Ectopia. 



Ectoretina (ek-to-ret f -in-ah) \_£kt6c, out; retina, retina]. 

 The external and pigmentary layer of the retina. 



Ectosarc (ek'-to-sark) [ektoc, outside; aap^, flesh]. 

 In biology, same as Ectoplasm, q. v. 



Ectoskeleton (ek-to-skel' -et-un) . Same as Exoskdeion. 



Ectosome (ek'-to-som) [£/cr<5c, outside; oibua, body]. 

 In biology, applied to the outer region of a sponge, 

 which forms the covering of the choanosome, or mid- 

 dle region, with its flagellated chambers. 



Ectosporous (ek-to-spo' -rus) \ekto<; , outside ; cirdpog, 

 seed]. See Exosporous. 



Ectosteal (ek-tos' '-te-al) [ekt6c, out ; bcsreov, a bone]. 

 Relating to, situated or occurring outside of, a bone. 

 :tostosis (ek-tos-tc/ -sis) [ekt6c, out ; exrreov, a bone]. 

 The growth of bone from without ; ossification that 

 begins at the perichondrium, or future periosteum. 

 Itotheca (ek-toth' -ek-ah) \ek~6c, outside; Wjkt), case]. 

 In biology, applied to the capsule of such compound 

 gonophores as those of Laomedea ; also to such the- 

 cse or asci as are exposed, e. g. those of discomycetous 

 fungi and gymnocarpous lichens. 



:toxemia (ek-toks-e' '-me-ah) \ek, out ; roiiKOv, poison ; 

 alua, blood]. Toxemia not originating within the 

 organism ; blood-poisoning from some cause not ex- 

 isting within the organism. 



Ectozoon (ek-to-zo' '-on) [ektoc, out ; Zuov, an animal : 

 //., Ectozoa~\. An external animal parasite ; an ecto- 

 parasite. 



Ectrodactylia, Ectrodactylism (ek-tro-dak-til'-e-ah, 

 ek-tro-dak' '-til-izm) [EK-pwua, abortion ; AaKrv'/.og, 

 finger]. Congenital absence of any of the fingers or 

 toes. 



Ectrogenic (ek-tro-jen'-ik) [enrpufia , abortion ; yewav, 

 to produce]. Due to some ioss of tissue, as from 

 traumatism or surgical operation. See also Teratism. 



Ectrogeny (ek-trof '-en-e) [kKTpuua, abortion ; yzvvuv, 

 to produce]. Loss or absence of any part or organ. 



Ectroma (ek-tro / -mah) \_EKrpuua, abortion: //., Ectro- 

 mata~\. An aborted ovum or fetus. 



Ectromelus (ek-trom'-el-us) [f/crpwovc. abortion ; ue/.oc, 

 limb]. A single autositic monster characterized by 

 the presence of aborted or imperfectly-formed limbs. 



Ectropion. 



Examples of this anomaly show every degree of 

 arrested development, from entire absence of the limb 

 to simple shortening. 



Ectropion (ek-trc/ -pe-on) [ek, out ; rpeireiv, to turn]. 

 An everted eye- 

 lid ; abnormal 

 eversion o f a n 

 eyelid ; also, an 

 everted state of , 

 the cervical por- 

 tion of the endo- 

 metrium. E., 

 Cicatricial,due 

 to destruction of 

 part of the skin 

 of the lid, with 

 cicatricial con- 

 traction. E. 

 luxurians, an 

 old name for ec- 

 tropion, with a proud-flesh appearance of the conjunc- 

 tiva. E., Paralytic, that due to paralysis of the 

 orbicularis palpebrarum. E., Sarcomatous. See 

 E. luxurians. E M Senile, found only in the lower 

 lid, due to relaxation of the orbicularis palpebrarum 

 muscle. E., Spastic, due to spastic contraction of 

 the fibers of the orbicular muscle lying near the mar- 

 gin of the orbit. 



Ectropium (ek-tro f -pe-um). Same as Ectropion. 



Ectrosis (ek-tro* -sis) [inrpuaiq, abortion]. An abor- 

 tion, or the production of an abortion. 



Ectrotic (ek-trof -ik) [be, out; -i-puoKeiv, to wound]. 

 Tending to cut short ; abortive ; abortifacient. 



Ectylotic (ek-til-of -ik) [ek, away; ri'/.oc, callus]. 

 Tending to remove warts or indurations. 



Eczema, (ek'-ze-mak) [ek~ee.iv, to boil over]. Tetter; 

 Moist Tetter ; an acute or chronic, non-contagious, 

 catarrhal inflammatory disease of the skin, character- 

 ized by multiformity of lesion, and the presence, in 

 varying degrees, of itching, infiltration, and discharge. 

 The skin is reddened, the redness shading off insen- 

 sibly into the surrounding unaffected skin. When 

 well-marked, the skin is fissured, with crusting, 

 leathery infiltration, and scaling. Eczema occurs in 

 skins that are particularly susceptible to the action 

 of external irritants. E. ani — of the anus — a trouble- 

 some variety common in children ; it may simulate 

 condylomata. E. articulorum, eczema of the flexor 

 surfaces of the joints. E. aurium, a common, 

 troublesome, pustular form affecting the ears. E. 

 barbae, a form resembling sycosis, but more superfi- 

 cial. It attacks the bearded portion of the face , but may 

 spread. E. capitis, a variety confined to the head. 

 It is usually seen in children ; is diffuse, pustular, im- 

 petiginous, not itchy, and may be associated with 

 pediculi and seborrhea. E. circumscriptum para- 

 siticum, a name given by Crocker to a form of erup- 

 tion that looks like a dry eczema, but has a border 

 more sharply defined than is usual in E. squamosum. 

 It occurs chiefly on the legs below the knee, and is 

 constituted of minute papules aggregated into a uni- 

 form moderately red, scaly patch, with sharply defined 

 borders. It is a chronic disease, and is probably par- 

 asitic in origin. E. crurum, a form occurring in old 

 people as a result of varicosity of the veins of the leg, 

 and not associated with eczema elsewhere. The skin 

 is much infiltrated, red, scaly, with indolent ulcers. 

 E. crustosum, eczema with the formation of thin and 

 pale-yellowish crusts. If these crusts are thick and 

 dark in color from capillary bleeding the condition is 

 termed £. impeti^inosum. This latter form occurs 

 frequently on the scalp and face of strumous children. 



