ISO 



224 



JAS 



connecting all places on the earth 

 which have the same mean tem- 

 perature : isotherm, n., is'-o-therm, 

 one of those lines. 



isotropic, a., Is'-o-trop'-ik (Gr. isos, 

 equal ; tropos, a turning), applied 

 to the condition of ' fibrils ' which 

 singly refract light ; the condition 

 of ' fibrils ' which doubly refract 

 light is called anisotropic, an'-is- 

 o-trop'-ik (Gr. anisos, unequal ; 

 tropos, a turning). 



issue, n., ish'-u (F. issu, born, 

 sprung ; Norm. F. issir, to go 

 out), an artificially - produced 

 wound, kept raw and open that 

 there may be a constant flow of 

 pus from the surface. 



isthmus, n., ist'-mus (L. isthmus, 

 Gr. isthmos, an isthmus), in anat. , 

 the narrow intervening or uniting 

 portion of organs : isthmic, a., 

 fattmflt, of or pert, to an isthmus : 

 isthmus favici\im,fdw'shi'um (L. 



fauces, the upper part of the 

 throat, faucium, of the upper 

 part of the throat), the space 

 between the soft palate and the 

 root of the tongue. 



itch, n., itsh (AS. gictha, an itch- 

 ing, a scab), a very troublesome 

 skin disease produced by the 

 presence of the Acarus Scabiei, or 

 itch parasite. 



iter ad infundibulum, U-er ad m' 



fund-ib'ul'um (L. iter, a path, a 

 way ; ad, to ; infundibulum, a 

 funnel), the passage between the 

 third ventricle of the brain and 

 infundibulum: iter a palato ad 

 aurem, a pal -at'- 6 ad dwr'em (L. 

 a, from ; paldtum, the palate ; 

 auris, the ear), the passage from 

 the palate to the ear; the Eustach- 

 ian tube : iter a tertio ad 

 quartum ventriculum, ler'shi-d 

 dd kwawrt'-um vent-rik'ul'um (L. 

 tertius, a third; quartus, a fourth; 

 ventriculus, a ventricle of the 

 heart), the passage between the 

 third and fourth ventricles of 

 the brain ; the aqueduct of Sil- 

 vius. 



Ivory Palm, or vegetable ivory, 



the hard albumen of the ' Phyt- 

 elophas Macrocarpa, ' used in the 

 same way as ivory. 



ivy, n., iv'i (AS. ifig; Ger. epheu, 

 ivy), a well-known evergreen 

 climbing plant ; the common ivy 

 is theHedra Helix, Ord. Araliacese. 



Ixia, n., iks'-i'd (Gr. ixia and ixos, 

 the mistletoe, bird lime), a genus 

 of very handsome plants when in 

 flower, Ord r Iridacese, so named 

 from the viscous nature of some 

 of the species : ixous, a. , ilcs'us, 

 having bird lime ; viscous : Ix- 

 odea, n., iks-dd'-Z-a, the ticks, 

 usually parasitic, on domestic 

 animals, occasionally on man, 

 Ord. Arachnida. 



jactitation, n., jaMtit-a'shun (L. 

 jactitio, I cast or toss to and fro), 

 a tossing about the body ; uncon- 

 scious movements of a patient in 

 the delirium of a fever. 



jaggery, n., jatf-ger-i (an Indian 

 name), a coarse dark sugar ob- 

 tained from the cocoa-nut, and 

 other palms, which when fer- 

 mented produces arrack. 



jalap, n. ,jal'-ap (Xalapa in Mexico, 

 where found; F. jalap), the dried 

 root of the plant Exogonium 

 purga, also called the ' Ipomcea 

 purga, ' Ord. Convolvulacese, which 

 in the form of powder is much 

 used in medicine as a brisk purg- 

 ative. 



Janipha, n., jdn-i/'-a (from Janip- 

 aba, the Brazilian name), a genus 

 of interesting plants, Ord. Eu- 

 phorbiacese : Janipha Manihot, 

 m&n'l'&t (a Brazilian name), a 

 shrub much cultivated in tropical 

 countries for its produce of starchy 

 matter, made into Cassava bread: 

 J. Iseflingii, Uf-lin'-jl-l (unas- 

 certained), a variety whose amyl- 

 aceous matter is used as food 

 under the name * Sweet Cas- 

 sava' ; ' tapioca ' is obtained from 

 the starch of the Bitter Cassava. 



Jasminaceae, n. plu., jds'mm-dl 



