

HEDERIN 



547 



HELICORUBIX 



ger 



t 



cor 



Hederin (hed / -er in) \hedera, European Ivy]. An in- 

 tensely bitter alkaloid from the seeds of Hedera helix. 

 It is said to be actively febrifuge. (The gum of ivy 

 has also been called hederin.) 



Hedge-hog Crystals. Crystals of urate of soda found 

 as a urinary deposit. The crystals are globular, with 

 spiny projections, and may cause severe vesical irrita- 

 tion. 



Hedge-hyssop (hej-his' -up) . See Gratiola. 



Hedonia (he-do / -ne-ah) [ijdovi/, pleasure]. Abnormal 

 cheerfulness ; amenomania. 



Hedonism {hed' -o-nizm) \fi6avij, pleasure]. The pm> 

 suit of pleasure ; in psychic medicine, the unreasoning 

 pursuit of some hobby or whim. 



Hedrocele (hed' '-rose/) \kSpa, anus ; idff.t), tumor]. A 

 hernia in which the part protrudes through the notch 

 of the ischium. Also, prolapsus of the anus. 



Hedrosyrinx (hed-rosi* -rinks) \_e6pa, anus ; funda- 

 ment ; avpty^, pipe] . Fistula in ano. 



Hedwigia (hed-wif -e-ah) [after Johann Hedvrig\. A 

 genus of amarydaceous trees. H. balsamifera. of 

 the W. Indies, affords a resin, not unlike copaiba in 

 uses. The bark is anti periodic, and contains a 

 convulsivant alkaloid, which would appear to be a 

 powerful heart-depressant and antithermic. 



Hedyosmon (hed-e-os' '-man) [r/dvg, sweet; hew), odor]. 



genus of tropical chloranthaceous trees and shrubs. 



H. arborescens, a tree of Jamaica, affords a remedy 



r dyspepsia. H. nutans, a shrub of the W. Indies, 



leaves that are good for headaches. 

 el (hil) [ME., heel, heel]. The hinder part of the 

 foot. H.-bone. See Calcaneum. 



Hegars Sign. See Signs and Symptoms, Table of . 



Hegar-Kohrn Method. See Treatment, Methods of. 



Heidenhain, Demilune Cells of. See Demilune and 

 Crescent of Gianuzzi. H.'s Method. See Stains, 

 Table of. H., Parietal Cells of. See Delomorphous. 

 H., Rods of. See Rods. H.'s Solution. See Stains, 

 Table of. 

 . Heimia [him' '-e-ah) [after Ludwig Heim, a German 

 botanist]. A genus of lythaceous shrubs of X. and 

 America. H. salicifolia (hanchinol), found in 

 Texas and far to the South, is resinous, antisyphilitic, 

 hemostatic, and febrifuge. Unof. 



Heintz's Method. A method of estimating uric acid 

 in the urine. Take ioo c.c. of urine. Add to this 

 5 c.c. of HO. Lay the mixture aside for 24 hours. 

 Collect the crystals on a weighed filter-paper, wash 

 with dilute HC1 ; dry at IOO° C. , and weigh. The 

 increase in weight will give the percentage of uric 

 acid. 



Heisch's Test. See Tests, Table of 



Heister's or Heisterian Valve. A fold of mucous 

 membrane in the cystic duct arranged in a spiral. 



Heitzmann's Theory. The theory that the axis-cyl- 



Iinder of a nerve-fiber is ordinary connective tissue 

 modified for the transmission of special impulses. 

 Hekistotherm (hek-is / -to-therm) [ijntaroq, least, worst ; 

 Oepiii], heat]. In biology, a plant that can subsist 

 with a minimum of heat, e.g. , a member of the Arctic 

 or Antarctic flora. 

 Helcoid \hel'-koid) \ff.nog, ulcer; e\6oc, likeness]. 

 Resembling an ulcer. 

 Helcology (hel-koV -o-je) [e?jtoc, ulcer; "toyoq, science]. 

 The pathology and treatment of ulcers. 

 Helcoma {hel-ko'-mah) [e/Moua, an ulcer: //., Helco- 



mata\ An ulcer. 

 Helcomenia hel-ko-me' '-ne-ah) [e/jlck, ulcer ; ur/v, 

 1 month]. Vicarious menstrual discharge from an 

 I ulcer. 



Helcoplasty (hel'-ko-plas-te) [f/A'oc, ulcer; -'/Acaetv, 

 to shape] . The treatment of ulcers by skin-grafting. 



Helcopoiesis (hel-ho-pcie* -sis) [k'/jeoq, ulcer; iroijjou;, 

 making]. The surgical formation of an- issue, for 

 counter-irritation. 



Helcosis (hel-ko* -sis) [i/jujoic, ulceration]. The forma- 

 tion and development of an ulcer. 



Helcotic (hel-kot'-ik) [e/.kutikoc, pertaining to an ulcer]. 

 Ulcerative ; of the nature of or accompanied by ulcera- 

 tion. 



Helenin (hel J -en-in) , C 6 H g O. Alant Camphor ; Inulol ; 

 the active principle of inula. It is a faintly odorous 

 and nearly tasteless, volatile substance, insoluble in 

 water, but soluble in ether, oils, and hot alcohol. It 

 is antiseptic and germicidal, and is recommended for 

 use in diphtheria and tuberculosis. Unof. 



Helenium (hel-e* -ne-um) \eirxviov, elecampane]. 1. 

 Same as Inula, q. v. 2. A genus of composite North 

 American herbs. H. autumnale, sneezewort. H. 

 nudiflonim, and H. bolanderi are strongly errhine, 

 and are substituted for amica. H. puberulum is 

 tonic, alterative, and errhine. H. tenuifolium, of 

 the Gulf States, is said to be a destructive cattle- 

 poison. Unof. 



Helianthella (he-le-an-thel' -ah) \ffuoq, the sun ; avdog, 

 flower]. A genus of North American composite herbs. 

 The root of H. tenuifolia is aromatic, expectorant, 

 antispasmodic, and, in large doses, emetic. It is of 

 reputed service in pulmonary complaints. Dose of 

 the fld. ext. tTLv-xxx. Unof. 



Helianthemum (he-U-an' -them-um) [if/uoc, sun ; avdoc, 

 flower]. Frost wort ; Rock Rose. The herb H. cana- 

 dense, astringent, aromatic, tonic, and alterative. It 

 is useful in diarrhea, scrofula, and secondary syphilis. 

 Dose of the fld. ext. rr\y-xx. Unof. 



Helianthin (he-le-an' -thin) \ff/M>q, the sun ; aitioq , a 

 flower], C 6 H 4 SO,Na,N:N.C s H 4 N(CH 3 ) r Methyl- 

 orange ; an orange-yellow powder used as a dye and 

 as a test in analyses. See Pigments, Conspectus of. 



Helianthus (he-lean' -thus) \j{fAoq, sun ; di^toc, flower]. 

 A genus of composite- flowered plants. The sun- 

 flower. H. annuus, a commonly cultivated species, 

 affords highly useful, oil-bearing seeds, the seeds of 

 some varieties being also edible. H. tuberosus, the 

 Jerusalem Artichoke, has large tuberous roots, some- 

 times eaten when cooked or pickled. Several of the 

 species are medicinal. 



Helichrysum (he-le-hri'-sum) [ij/ioc, sun ; ^/jixtoc, 

 gold]. A genus of old-world composite plants. The 

 European species (as H. arenarium. H. stcechas) 

 are aromatic stimulants, used in domestic practice. 

 Several South African species (H. auriculatum, im- 

 bricatum, nudifiorum, etc.) are used as pectoral 

 teas. 



Helicin (hel' '-is-in) , C 13 H, 6 O t . A glucosid, produced 

 by oxidizing salicin with HNO s . It dissolves with 

 difficulty in water, crystallizes in small needles, and 

 melts at 175 C. 



Helicine (hel'-is-in) [c/./f, a spiral]. I. Tortile, or 

 spiral in structure. 2. Pertaining to the helix. H. 

 Arteries, arteries proceeding from the profunda penis 

 branches of the pudic, and from the dorsal arteries of 

 the penis. See Arteries, Table of. 



Helicogyrate (hel-ih-o-fi'-rdt) [£U£, a spiral ; yvpoc, a 

 ring]. In biology, having a spiral annulus, as the 

 spore-cases in trichomanes. 



Helicoid (hel f -ik-oid) [£Uf, a spiral ; eldoc, form]. 

 Spiral ; coiled like a snail-shell or helix. 



Helicopepsin (hel-ik-o-pep* -sin) [i'/i;, a spirally coiled 

 snail; ■zkibic, digestion]. A peptic ferment found by 

 Krukenberg in snails. 



Helicorubin (hel-ik-o-ru' '-bin) [e/t£, a spiral, the snail ; 

 povSivi, ruby]. A pigment of certain invertebrates; 

 the same as Hemochromogen and Enterohematin, q. v. 



