ISO 



223 



ISO 



isk'i-o, attachment or connection 

 with the ischium. 



ischuria, n., isk-ur'i-a, also 

 ischury, n. , uk'ur-i (Gr. ischo, I 

 stop or retain ; ouron, urine), the 

 suppression or stoppage of urine : 

 ischuretic, n., isk'-ur^-ik, a 

 medicine adapted to relieve 

 ischuria : adj. , having the power 

 or quality of relieving ischuria. 



isidoid, a., is'-id-oyd (isidos, re- 

 sembling coral from Gr. isos, 

 equal, similar ; eidos, resem- 

 blance), in bot., covered with a 

 dense mass of conical soredia, as 

 the surface of lichens : isidiose. 

 a., iS'id'-i'dz, having powdery, 

 coralline excrescences : isidiif- 

 erous, a., iS'id f 'i-if-er-us(L.fero, 

 I bear), having isidiose excres- 

 cences: isidium, n,, iS'fd'i'tim, 

 coral-like soredia on the surface 

 of some lichens. 



isocheimal, a., is^d'Tclmf-dl, also 

 isocheiminal, a., -lclm'>ln>dl (Gr. 

 isos, equal, similar ; cheima, 

 winter), of the same winter 

 temperature; applied to imagin- 

 ary lines drawn through places on 

 the earth's surface which have the 

 same mean winter temperature. 



isochomous, a., is-dMtim-us (Gr. 

 isos, equal, similar ; choma, a 

 heap, a mound), in bot., applied 

 to branches springing from the 

 same plant, and at the same 

 angle. 



IsoetacesB, n. plu., is'-d'et-d'se-e 

 (Gr. isos, equal ; etos, a year 

 the plants being the same 

 throughout the year), the Quill- 

 wort family, an Order of plants, 

 generally included under the Ord. 

 Lycopodiacese : Isoetes, n., s-o- 

 Zt'-ez, a genus of curious little 

 aquatic plants, found in some 

 lakes in this country ; moss-like 

 plants, intermediate between ferns 

 and mosses. 



isomeric, a., Is'd-m&r'-ik (Gr. isos, 

 equal ; meros, a part), formed of 

 the same elements in the same 

 proportions, but having different 



physical and chemical properties : 

 isomerism, is-om'-er-izm, identity 

 in elements, but with difference 

 of properties : isomerous, a., 

 iS'8m''%r-us, in bot., having each 

 of the organs of a flower composed 

 of an equal number of parts. 



Isonandra, n., is'on-and^ra (Gr. 

 isos, equal ; aner, a male, andros, 

 of a male), a genus of trees, Ord. 

 Sapotacese : Isonandra gutta, 

 gut f -td (L. gutta, a drop), the 

 source of the Gutta Percha, a kind 

 of caoutchouc,, used largely in the 

 manufacture of articles of daily 

 use. 



Isopod, n., is'o-pod; Isopoda, n. 

 plu., iS'dp'-od-a (Gr. isos, equal; 

 podes, feet), an Order of' Crust- 

 acese in which the feet are like 

 one another, and equal : isopod- 

 ous, a., iS'dp'-od'US, having legs 

 alike, and equal. 



isosporous, a., is-fa'por-us (Gr. 

 isos, equal; poros, a pore), in bot., 

 applied to cryptogamic plants 

 which produce a single kind of 

 spore, as ferns : isosporese, n. 

 plu., is'ds'por'e-e, those ferns, 

 * Ophioglossacese, ' and ' Equis- 

 etacese,,' which produce a single 

 kind of spore, which in its turn 

 gives origin to a prothallus 

 furnished with chlorophyll and 

 roots, and capable of independent 

 existence. 



isostemonous, a., Is'-os-Urnf-on-us 

 (Gr. isos, equal ; stemon, a thread 

 or stem), in bot., having the 

 stamens and petals equal in 

 number ; having the stamens and 

 floral envelopes the same in the 

 number of their parts, or in the 

 multiples of the parts. 



isotheral, a., ts-d'th'er.al (Gr. isos, 

 equal, similar ; theros, summer), 

 passing through places on the 

 earth which have the same summer 

 temperature. 



isothermal, a., is'-o-therm'al (Gr. 

 isos, equal ; thZrme, heat), having 

 the same mean annual temperat- 

 ure ; applied to imaginary lines 



