ISOPHOROUS 



630 



ITER 



each eye being equal, and the visual lines lying in the 

 same plane. 



Isophorous (i-soff'-or-us) \laoc, equal ; <j>epeiv, to bear]. 

 In biology, of equal taxonomic importance, as a spe- 

 cies and its abnormal forms. 



Isopia (i-so'-pe-ah )[iaoc, equal; uij), eye]. A term 

 proposed to indicate equal acuteness of vision in the 

 two eyes. 



Isopleural (i-so-plu' -ral) \looc, equal ; nTievpd, a rib]. 

 Bilaterally symmetric. 



Isopogonous (i-so-pog' '-o-nus) \iooc, equal ; wuyuv, 

 beard, barb] In biology, applied to feathers, the 

 web of which is alike on both sides of the rachis. 



Iso-propylamin (i-so-pro-pW -am-in). See Propylamin. 



Isopters (i-sop' -ters) \laoc, equal; okttjp, observer]. The 

 curves of relative visual acuity of the retina at dif- 

 ferent distances from the macula, both for form and 

 for color. 



Isopurpurin (i-so-pur' -pu-rin) \iaoc, equal ; purpura, 

 purple], C u H 5 2 (OH) 3 . A coal-tar color used in 

 dyeing, closely allied to alizarin ; it is formed by 

 heating beta-anthraquinondisulphonic acid with sodic 

 hydrate and potassium chlorate. It produces a yellow 

 shade of red. See Pigments, Conspectus of. 



Isoquinolin (i-so-kwin'-o-lin) [iffoc, equal; quinolin], 

 C () H.N. A substance that occurs together withquinal- 

 din and ordinary quinolin in the crude quinolin from 

 coal-tar. It is very similar to quinolin, solidifies at 

 o° C. to a crystalline mass, melting at 20-22 C, 

 and boiling at 237 C. 



Isosaccharic Acid (i-so-sak-a'-rik). See Acid. 



Isosaccharin (i-so-sak' -ar-in) \iaoc, equal ; caKxapov, 

 sugar], C 6 H 1D 5 . An isomerid of saccharin. It 

 results from the action of lime upon milk-sugar and 

 maltose. 



Isoscope (i'-so-skop) \iooc, equal; okotzuv, to see]. 

 An instrument consisting of two sets of parallel ver- 

 tical wires, one of which can be superimposed on the 

 other ; it is designed to show that the vertical lines of 

 separation of the retina do not correspond exactly to 

 the vertical meridians. 



Isospore (i'-so-spor) \iooc, equal ; ondpoc, a seed]. In 

 biology, a plant producing but one kind of spore ; a 

 zygosperm. 



Isosporous (i-sos' -por-us) \iooc, equal ; o-nropa, seed]. 

 Same as Homosporous . 



Isostemonous (i-so-stem? -o-nus) \ivoe, equal ; arrjixov, 

 a stamen]. In biology, having the stamens of the 

 same number as the parts of the calyx or corolla. 



Isotagmata (i-so-tag' -mai-ah). See Inotagmata. 



Iso-therapeutics (i-so-ther-ap-u'-tiks). Same as 

 Isopath otk erapy. 



Isothermal (i-so-ther' -mal) [l.ooc, equal ; Oep/uri, heat]. 

 Of equal or uniform temperature. I. Lines, in physi- 

 cal geography, lines drawn through places having the 

 same average temperature for a given period of time. 

 Inasmuch as it frequently happens that two places hav- 

 ing the same annual average temperature may have, 

 one a climate of great extremes, the other a very 

 equable climate, it is now customary to display com- 

 parative isotherms for the six warm and the six cold 

 months of the extra-tropical regions. I. Zones, 

 zones bounded by isothermal lines. 



Isotome (i'-so-tow) \leoQ, equal ; tout/, a cutting]. In 

 biology, an imaginary line or plane indicating homo- 

 logous segments or structures. 



Isotonia (i-so-to' -ne-ah) [*<xoc, equal ; r6vog, tension]. 

 Equality of tension of the blood. 



Isotropic (i-so-trop' '-ik) \iaoc, equal ; rponr/, turning]. 

 Having the same properties throughout ; isotropous ; 

 isotropal . 



Isotropous (i-sotf -ro-pus) \iooc, equal ; Tponr/, a turn- 



ing]. Having the same shape and appearance, from 

 whatever point observed. A term applied to singly- 

 refracting bodies. 



Isozooid (i-so-zo' -oid) \iooc, equal ; £tiov, anima! ; 

 elSoc, form]. In biology, a zooid resembling the 

 organism producing it. Cf. Allozooid. 



Issue (ish'-u) [Fr. , issue, from exire, to go out]. A 

 discharging ulcer, especially that made artificially 

 for purposes of drainage, or counter-irritation. I.- 

 pea, a pea or pea-shaped pellet (as of ivy-wood, or 

 orris-root), inserted into an issue to keep up suppura- 

 tion. Orange-seeds are also used for the same pur- 

 pose. 



Istarin (is'-tar-in). A nitrogenous, phosphorized sub- 

 stance of complex structure occurring in brain-tissue. 

 Its properties have not been investigated. 



Isthmiac, or Isthmic (is'-me-ak or is'-mik) [/crfiuoc, 

 a narrow passage]. Pertaining to any isthmus, as 

 that of the fauces. 



Isthmitis (is-mi'-tis) [iadfidg, a narrow passage ; inc , 

 inflammation]. Inflammation of the fauces. 



Isthmo- (is' -mo-} fod/j.6g, a neck]. A prefix signifying 

 the fauces. 



Isthmocatarrhus (is-mo-kat-ar'-us) [ioO/uoc, isthmus; 

 Karappieiv, to flow down]. A catarrh of the faucial 

 isthmus. 



Isthmodynia (is-mo-din f -e-ah) \^icdfi6c, neck ; c 

 pain]. Pain in the faucial isthmus. 



Isthmoid (is' -moid} [laO/uoc, a neck; eldog, likeness]. 

 Resembling an isthmus. 



Isthmopathy (is-mop'-ath-e) [io6/ll6c, neck ; TvdOoc, 

 disease]. A disease of the faucial isthmus. 



Isthmoplegia (is-mo-ple' -je-ah) \\oQjioq, neck ; - 

 stroke]. Paralysis of the faucial tract. 



Isthmopolypus (is-mo-poF -ip-us) [lodfioc, isthmus; 

 noTiinrovg, polyp]. A polyp of the fauces. 



Isthmorrhagia (is-mor-a'-je-ah) \^iodu6c, isthmus; 

 p?jyvvvai, to burst forth]. Hemorrhage from the throat. 



Isthmospasm (is'-mo-spazm) [loO/ioc, isthmus ; on 

 spasm]. Spasm of the isthmus of the fauces. 



Isthmus (is'-mus) [ioO/udg, isthmus]. The neck or 

 constricted part of an organ. The part of the brain 

 which, situated axially, serves to unite the forebrain, 

 the cerebellum, and the spinal cord. I., Gyral, a nar- 

 row gyrus connecting two adjoining gyri ; an annectant 

 convolution or p/i de passage. I. of Fauces, tin 

 between the arches of the palate. I. of Thyroid Gland, 

 the transverse cord connecting the lobes of the thyroid 

 body. 



Isuretin [i-su-re' -tin) \iooq, equal ; ovpov, urine], 

 CH 4 N 2 0. A substance isomeric with urea ; it appears 

 on evaporating the alcoholic solution of hydroxylamin 

 and hydrogen cyanid. It crystallizes in rhombic prisms 

 similar to those of urea, and melts at 104-5 C. 



Italian (i-tal'-yan) \Italus, an Italian]. Of or pertain- 

 ing to Italy. I. Fever. Synonym of Influenza 

 also of Mediterranean Fever. I. Leprosy. ! 



Pellagra. I. Method. 



Itch (ich). See Scaoies. 



Bakers'. See Baker. 



See Tagliacotian Met 

 I., Army. See Army. L 

 I., Barbers'. See Bart 

 I.,. Bricklayers'. See Bricklayer. I., Drunkards', 

 an intense itching frequent in old alcoholics. !■■ 

 Grocers'. See Grocer. I. -mite. Si 

 scabiei. I., Norway, an extreme form 

 scabies of the body, resulting in fish-scale-like BBS 

 quamation. Hebra's first case was from Nor\\a\ . I- 

 Warehousemen's. Same as /. . Gro 



-ite (it). A suffix employed in mineralogy denol 

 mineral, or of mineral origin. A contraction "i 

 a stone. 



Iter (i'-ter) [iter, a journey]. A passage affording con 

 munication between two or more parts. I. ad infundi- 



