I SAT ATE 



318 



ISTHMUS 



Isatate (is'-at-at). A salt of isatic acid. 



Isavol. See Isarol. 



Ischeocele [is'-ke-o-sel). See Ischiocele (Illus. Diet.). 



Ischialgia. (See Illus. Diet.) Syn., Ischias; Ischiasis. 

 I., Landouzy's, neuralgia of the sciatic nerve, with 

 atrophy of the muscles of all or part of the affected 

 leg. 



Ischias, Ischiasis (is'-ke-as, is-ke-a'-sis). See Ischial- 

 gia (Illus. Diet.). 



Ischiofemoral (is-ke-o-fem'-or-al). I. Relating to the 

 ischium and the femur. 2. The adductor magnus 

 muscle. 



Ischiomenia (is-ke-o-me'-ne-ah). See Ischomenia 

 (Illus. Diet.). 



Ischiopagus. (See Illus. Diet.) I. tetrapus, one 

 with four legs. I. tripus, one with three legs. 



Ischiopagy (is-ke-op' -aj-e) [icrj/oi', the hip-joint; irayoc, 

 anything which has become solid]. The condition of 

 monstrosity in which two bodies are united by the coc- 

 cyges and sacra 



Ischioperineal [is-ie o-per-in-e'-al). I. Relating to 

 the ischium and the perineum. 2. See Transversa* 

 perina-i, in Table of Muscles (Illus. Diet.). 



Ischioprostatic (is-ke-o-pros-tat'-ik) I. Relating to the 

 ischium and the prostate. 2. The transversus perinzei 

 muscle. 



Ischiopubic (is-ke-o >pu f -bik). Relating to the ischium 

 and the pubes. 



Ischochymia [is-ko-ki'-me-ali) [ia^e/v, to suppress ; 

 X'vuos, juice]. Einhorn's term for dilation of the 

 stomach because stagnation of food is the first essential 

 symptom of the disease and may be present without 

 any sign of dilation. 



Ischogyria (js-ko-ji'-re-ak) [Z<tj«v, to suppress; yvpoq, 

 a curve]. The small convolutions produced by senile 

 atrophy. Cf. Ischnogyria (Illus. Diet.). 



Isinglass. (See Illus. Diet.) I., Bengal, agar-agar. 

 I., China, I., Chinese, I., East Indian, I., Indian, 

 the sounds of two species of Polynemus and other fish 

 of the Indian Ocean. I., Japanese. See under 

 Gelidiutn, Ettcheuma, Gloiopeltis, Gracilaria, Sphaero- 

 ccesus. I., Russian, ichthyocalla from Acipenser husa 

 and other species. I., Samovey, inferior Russian 

 isinglass. I., Staple, Russian isinglass marketed in 

 twisted forms called staples ; the different sizes of this 

 are designated as long staple and short staple. 



Island. (See Illus. Diet.) I.s, Langerhans', little 

 cellular masses in the interstitial connective tissue of 

 the pancreas subject to various interpretations. Syn., 

 Follicular points oi }. Renaut. I.s, Olfactory, masses 

 of pyramidal cells crowded together and distorted in 

 form, discovered by Calleja in the cinerea of the tri- 

 gonum olfactorium. I.s, Pander's. See under 

 Pander { Illus. Diet.). 



Isoagglutinin (is-o-ag-glu' '-tin-in) [iooc, equal ; agglu- 

 tinin']. An agglutinin in the blood of an individual 

 capable of agglutinating the blood-corpuscles of another 

 individual of the same species. 



Isoamylacetate (t's-o amil-as'-et-at'). See Amyl Acet- 

 ate. 



Isoamylene (is-o-ain'-il-tn). See Pental (Illus. Diet. ). 



Isobodies (is-o-bod'-lz) [ionr, equal ; body\ See Iso- 

 agglutinin, hohcmolysin, /.utry/olvsin. etc. 



Isococain (is-o-ko'-ka-in). See Dextracocain. 



Isocreatinin (is-o-kre-at , -in-in). C 4 H 7 N.,0. An 

 isomer of creatinin isolated from decomposing flesh, 

 forming a fine yellow crystalline powder. 



Isocytolysin iis-o-si-tol'-is-in) [tffoc, equal; Kvror, 

 cell; /vetv, to loose]. A cytolysin from the blood of 

 an animal, capable of acting against the cells of other 

 animals of the same species. Cf. Jsoketuolysin. 



Isodulcite (is-o-dnl'-sM ). See Rhanmose (Illus. Diet.). 



Isoerythroagglutinin (is-o-er-ith-ro-ag-glu'-tin-in'). 

 See Isoagglutinin. 



Isogamy (is-og' -am-e) \laoc, equal ; yauoc f marriage]. 

 The production of gametes of uniform size and inca- 

 pable of being distinguished as macrogametes or mi- 

 crogametes. 



Isohemoagglutinin (is-o-Jieni-o-ag-glu' '-tin-in). See 

 Isoagglutin in . 



Isohemolysin {is-o-hem-ol' '-is-t'n) [ioog, equal ; aifia, 

 blood; Xveiv, to loose]. In Ehrlich's lateral-chain 

 theory, a hemolysin capable of acting against the blood 

 of other animals of the same species as the one pro- 

 ducing it, but capable of hemolizing the red blood- 

 corpuscles only of such as have red blood-corpuscle 

 receptors very similar to or identical with the receptors 

 of the blood giving rise to the hemolysin (Gay). Cf. 

 Isocytolysin. 



Isohydrobenzamid (is-o-hi-dro-ben'-zam-id). See 

 Amarin (Illus. Diet.). 



Isoidiolysin (is-o-id-e-ol'-is-in). See Idioisolysin. 



Isolactose (is-o-lalZ-tdz). A disaccharid or true sugar 

 formed by the action of an enzyme on lactose or milk- 

 sugar. 



Isolysin (is-ol'-is-in) [woe, equal; /htr, to loose]. A 

 lysin produced in the blood of an animal by the blood- 

 cells of another animal of the same species^ 



Isolysis (is-ol'-is-is). The hemolytic action of the 

 blood-serum of an animal of one species upon the 

 corpuscles of another individual of the same species. 



Isomaltose (is-o-n/a//l / -los). C, 2 H. w O,j. A saccharo- 

 biose formed by the action on starch of an enzyme 

 capable of producing maltose. It is not directly fer- 

 mentable by yeast; is very soluble in water, is sweet, 

 and occurs in small quantity in the urine. 



Isonitrosoantipyrin ( is-o-ni-trc-so-mi-tc-pi'-rin). See 

 Nilrosophenyl dimeth) 'Ip\ >razol. 



Isopilocarpin (n-o-pil-o-kar'-piii). An alkaloid from 

 jaborandi isomeric with pilocarpin and similar to it in 

 physiologic effect but weaker. 



Isopral (is'-o-pral). Trichlorisopropyl alcohol. A 

 hypnotic substance with odor of camphor. 



Isoprene (is'-o-pren). C 5 H 8 . A product of the frac- 

 tional distillation of caoutchoucin or eupion discovered 

 by Greville Williams; with strong acids it is converted 

 into caoutchouc. It is found as a constituent of oil of 

 turpentine. 



Isoterebentene (is-o-ter-e-ben'-teii). See Dipcn/ene 

 (Illus. Diet.). 



Isotonic (is-o-ton'-ile) [trioc, equal; rdror, tension]. I. 

 Having uniform tension or tonicity. 2. Applied to a 

 solution of equal density, as the blood or some other 

 fluid taken as a standard. Cf. Hypertonic, Hypotonic. 

 I. Salt Solution, one having the same osmotic ten-ion 

 as the blood-serum ; a 0.9% or "normal salt solution." 



Isotonicity (is-o-ton-is'-it-e). I. Same as Isotouia 

 (Illus. Diet.). 2. Equality of osmotic pressure in 

 different fluids. 



Isotoxin (is-o-toks'-in) \laoc, equal; to^ik6i\ poison], 

 A toxin elaborated in the blood of an animal and toxic 

 for animals of the same species. 



Isotropy (is-ot'-ro-pe) [ierof, equal; rpoirf/, turning]. I. 

 The condition of having equal or uniform properties 

 throughout. 2. In embryology, Pfliiger's term for 

 absence of predetermined axes. 



Issaeff's Period of Resistance. See under Resist- 

 ance. 



Isthmocholosis (is-mo-kol-o / -sis) [taftfioc, neck; ;v»>'/, 

 bile]. Angina accompanied with bilious disorder. 



Isthmopyra [is-mo-pi'-rali) [iafyi6c, neck; irvp, fire]. 

 Inflammation of the mucosa of the fauces. Syn., 

 Pyronckont : Pyrongone. 



Isthmus. (See Illus. Diet.) I., Guyon's, narrowing 



