ISODYNAM' »l > 



629 



[SOPHORIA 



Isodynamous (i-so-di' nam us) [ioog, equal ; fivvaptg, 

 power, force]. Same as Isobrious. 



Iso-electric \i-so-e-lek' -trie) [ioog, equal; iffxKTpov, 

 amber]. Equally electric; applied to two bodies 

 or points. I. Curves. See Tension-curves. I. 

 Surfaces. See Tension plan, . 



Isogamous {is ' atn-us) [ioog, equal; mar- 



riage]. A term used to designate thai mode of repro- 

 duction in which the uniting gametes are of equal 

 size. The same as o injugating. 



Isogamy (/-y<;i > ' / -</w-(-) [ioog, equal; yd//o£, marriage]. 

 In biology, conjugation <>f similai gametes. 



Isogeny {i-soj' '-en-e) [ioog, equal; ysvog, kind]. In 

 biology, having a general similarity of origin. 



Isognathous (/ sog 1 '-na-thus) L" 7 " 1 . equal ; ; vadog, jaw]. 

 In biology, having the molar teeth of both jaws alike. 



Isogonic {i-so-gon' '-ik) [ioog, equal ; yoi-og, offspring]. 

 In biology, characterized by isogonism. 



Isogonism {i-sog' -o-nizm) [ioog, equal; y6vog, off- 

 spring]. In biology, the production by different stocks 

 of sexual organisms of identical structure. 



Isogynous {i-soj' -in-us) [ioog, equal; ywrj, female]. 

 In biology, having the pistils or carpels equal in 

 number to the sepals. 



Isolate (is'-so-ld/ or i'-so-ldt) [isola, an island]. To 

 separate one from another. To place apart. In 

 chemistry, to separate an element from its combina- 

 tion. In electricity, to insulate. 



Isolation [is-o-la' '-shun) [isola, an island]. The act 

 or process of isolating, or the state of being isolated; 

 separation of those ill of contagious diseases from 

 other persons. 



Isologous {i-sol* -o-gus) [ioog, equal ; 7.6yog, method, 

 ratio, or system]. Having similar relations or pro- 

 portions. A qualification applied to compounds con- 

 taining a like number of carbon -atoms, with a gradually 

 decreasing number of hydrogen-atoms. 



Isolophobia (is-o-lo-fo' -bc-ah) [isola, an island; 0o/3oc, 

 fear]. Morbid dread of being alone. 



Isomastigate (i-so-mas' -tig-at) [ioog, equal ; pdori^, a 

 whip]. In biology, applied to organisms bearing two 

 or more similar Ilagella. 



Isomer {i'-som-er) [ioouepi/g, having equal parts]. An 

 isomeric body. The same as hornet-id. 



Isomere {if -so-mer) [ioofiepr/g, having equal parts]. In 

 biology, a portion of one organism that is homologous 

 with a portion of another organism. 



Isomeric {i-so mer'-ik) [ioog, equal ; n&pog, a part]. In 

 chemistry, applied to substances having the same cen- 

 tesimal composition, but the molecules of which have 

 an essentially different structure and chemic properties ; 

 e.g., aldehyd and ethylene oxid, both of which have 

 the formula C 2 H 4 0. The former, however, has the 

 structure — 



Methyl. Carbonic 

 oxid. 

 CH 3 — CO — H, 



while the latter is composed of two molecules of 

 ethylene, joined by an atom of oxygen, thus (CH 2 ) — 

 O — (CH.,). This, the most common type of isomer- 

 ism, is sometimes called metamerism. The term is also 

 applied to substances having the same centesimal com- 

 position, but whose molecular weights are in even 

 multiples, a type of isomerism commonly called poly- 

 merism. Also, in crystallography, applied to any sub- 

 stance that crystallizes in more than one form. Also, 

 applied to a substance existing in two or more 

 forms, a type of isomerism called allotropism. I. 

 Theory of Nerve-force ; Herbert Spencer's 

 hypothesis that in nervous action the disturbance 

 transmitted is a wave of isomeric change, the alter- 



nation of isomeric states depending upon both nerve- 

 fiber and molecular continuity. 



Isomerids {i-som* , consisting of equal 



pan , equal; uepog, a part]. A name applied 



to different substances possessing the same molecular 

 composition. I., Physical, a designation applied to 

 rivations to which one and the same structural 

 formula niu-i be assigned. They have been explained 

 by assuming them to be different aggregations ol mole- 

 cules that were chemically similar. See also Physi- 

 cal Mold l/lt-S. 



Isomerism {j.-somf -er-izni) [ioog, equal; \tkpog, a part]. 

 I be phenomenon ol bodies of like composition and 

 like number of atom-, being different in physical or 

 in chemic properties, or in both. I., Geometric. 

 Alloisomerism, q.v. I., Spatial. Same as /. , < 

 metric. 



Isomerous {i-som' '-er-us) [ioog, equal ; \ikpog, part, 

 share]. In biology, having an equal number of parts, 

 ridges, or markings. 



Isometric {i- so-met' -rik) [ioog, equal ; perpov, measure]. 

 Of» equal measure. I. Act, the t< nsion of a muscle 

 when stimulated, its length remaining constant. 



Isometropia {i-so-met-ro 1 '-pe-ak) [ioog, equal ; uerpov, 

 measure; uTp, eye]. Equality of kind and degree in 

 the refraction of the two eyes. 



Isomorph [i'-so-morf) [ioog, equal ; uopijyf], form]. In 

 biology, one of two similar organisms belonging to 

 different groups. 



Isomorphic {i-so-mor'-Jik) [ioog, equal ; fiopoi/, form]. 

 In biology, pertaining to morphologic similarity. 



Isomorphism {i-so-mor' -Jizm) [ioog, equal; no 

 form]. Similarity in crystalline form. Also, the replace- 

 ment of one element in a crystalline salt by another, 

 without alteration of form or system. I., Heteromer- 

 ous, a condition of dissimilarity in molecular composi- 

 tion. I., Isomerous, a condition of similarity in 

 molecular composition. I., Polymeric, the substitu- 

 tion of two or more atoms of one element for one of 

 another, without alteration of crystalline form. 



Isonitrosoacetones {i-so-ni-tro-so-as / -et-onz) . A group 

 of colorless crystalline bodies, readily soluble in ether 

 and in chloroform, and as a rule soluble with difficulty 

 in alcohol. Their alkaline solutions have an intensely 

 yellow color. 



Isonitroso-compounds {i-so-ni-tro'-so-kom'-pnvndz). 

 Compounds that contain the bivalent oximid group 

 =N.OH linked to carbon. 



Isonomic [i-so-nom' -ik) [toovo/wiSg, having equality of 

 laws]. In chemistry, applied to isomorphism ex- 

 isting between two compounds of like composition. 



Isonym {i'-so-nim) [ioog, equal; ovopa, a name].. A 

 paronym. 



Isopathotherapy (i-so-path-o-ther'-ap-e). Same as Iso- 

 pathy. 



Isopathy {i-sop 1 '-ath-e) [ioor, equal ; jzafiog, suffering]. 

 A term used to denote the treatment of disease by 

 the administration of one or more of its own products. 

 Thus, smallpox would be treated by the administra- 

 tion internally of the variolous excretions. 



Isopelletierin {i-so-pel-ef-e-er-in) [ioog, equal ; pelle- 

 tierin\. A substance found in the root-bark of Punica 

 granatum. It has the same properties as pelletierin. 



Isopepsin {i-so-pep/ -sin) [ioog, equal ; -• \\>tg, digestion]. 

 I. A body formed by heating pepsin to a point be- 

 tween 104 and 140 F. It changes albumin into 

 parapeptone. 2. Same as Parapeptone. 



I„opetalous {i-so-pef '-al-us) [ioog, equal; -ira/.ov, a 

 leaf]. In biology, having the petals alike. 



Isophoria {i-so-fi/ -re-ah) [ioog, equal ; oopog, a tending]. 

 A condition in which the eyes lie in the same hori- 

 zontal plane, the tension of the vertical muscles of 



