HYDRORHEOSTAT 



299 



HYPERABDUCTION 



Hydrorheostat ( hi-dro-re' -o-stat ) . A rheostat in which 

 the resistance is furnished by water. 



Hydrorrhachis. (See Illus. Diet.) H., External. 

 See Meningocele (Illus. Diet.). 



Hydroscopy (hi-dros'-ko-pe) [vdup, water ; okotzeIv, to 

 examine]. The investigation of water or watery fluids. 



Hydrospirometer (hi-dro-spi-rom* -et-ur). A spirom- 

 eter in which a column of water acts as an index. 



Hydrostatic. (See Illus. Diet.) H. Exploration, 

 M. See's method of diagnosing pelvic disease by pal- 

 pation of the abdomen while the patient is extended in 

 a bath covering its surface. 



Hydrosyringomyelia ( hi-dro-sir-ing-go-mi-e' - le- ah ) 

 [vtup, water ; avpi)i, tube; /zi'f/dc, marrow]. Dila- 

 tion of the central canal of the spinal cord by watery 

 effusion attended with degeneration and the formation 

 of cavities. 



Hydrotaxis (hi-dro-taks* -is) [ydup, water ;.rd^tc, ar- 

 rangement]. The determination of the direction of 

 movement by moisture. Cf. Hydrotropism. 



Hydrothermal (hi-dro-thur / -mal) [y6up, water; Oepfuj, 

 heat]. m Pertaining to warm water; said of springs. 



Hydrothermostat \hi-dro-thur / -mo-stat) [ydup, water; 

 Oipuij, heat; orardc, standing]. An apparatus for pro- 

 viding a continuous degree of heat for therapeutic pur- 

 poses. 



Hydrotimeter (hi-dro-tim' -et-ur) [Wwp, water; uerpov, 

 measure]. An apparatus to determine the amount of 

 calcareous salts in water by means of soap. 



Hydroureter (hi-dro-u'-re-lur). Dropsy of the ureter. 



Hydroxycamphor (hi-droks-e-kam' -for). C 10 H 16 O r A 

 faint yellow liquid, with odor of turpentine and possess- 

 ing weak acid properties ; it boils at 250 C. 



Hydrozone (hi'-dro-zon) [iitSotp, water; ozone]. An 

 aqueous solution of chemically pure hydrogen dioxid; 

 it is used as a bactericide and healing agent. 



Hydruret (hi'-dru-rei). See Hydrid (Illus. Diet). 



Hyenanchin, Hyaenanchin (hi-e-nan'-kin) \yaiva, 

 hyena; ayxeiv, to strangle]. An amorphous, neutral, 

 bitter, highly toxic substance contained in the outer 

 envelopes of the fruit of Toxicodendron capense, 

 Thbg. , a euphorbiaceous plant of South Africa the fruit 

 of which is used to poison hyenas. The poison is like 

 strychnin in action, except that it affects the cerebrum 

 and does not act on the nerve-trunks or muscles. 



Hygiama Jii-ge-am'-ah). A dietetic said to consist of 

 milk, cereals, and cacao. 



Hygieinism (hi' ' -je-in-izm) [iyicta, health]. Sanita- 

 tion. 



Hygieinization (hi-je-in-i-za' -shun). The establish- 

 ment of sanitary conditions. 



Hygiology (hi-ge-ol'-o-je). See Hygieology (Illus. 

 Diet.). 



Hygrol (hi'-grol). Colloidal mercury. 



Hygrostomia (hi-gro-stc/ -me-ah) [yypoc, moist; aroua, 

 mouth]. Chronic sali%-ation. 



Hyla (hi'-lah). See Paraqueduct (Illus. Dict.V 



Hyle (hi'-le) [i>.7j, matter]. The primitive undifferen- 

 tiated matter, mass, or body in nature. Cf. Protyle. 



Hylephobia (hi-le-fo'-be-ah) [1/^, matter; pd/foc, fear]. 

 Insane dread of materialistic doctrines. 



Hylic (hi'-lik). 1. Relating to primitive matter. 2. 

 Adami's name for primal pulp-tissue. 



Hylology (hi-lol f -o-je) [v/.y, matter; Myoc, science]. 

 The science of elementary or crude material. 



Hyloma (hi-lo'-mah) \y~f.i), matter]. Adami's term 

 for a tumor originating in one of the primal pulp-tissues; 

 subdivided into epihyloma, hypohyloma, and meso- 

 hyloma. 



Hylozoism (hi-lo-zo' -itm) [v7.tj, matter; C(Ji, life]. 

 The theory that all matter is endowed with life. 



Hymenogeny (hi-men-o/'-en-e) [vur/v, a membrane ; 



yewav, to produce]. The formation of a pellicle on 

 the globules of one liquid by simple contact with 

 another liquid, as when liquid albumin falls into liquid 

 fat. Cf. Haptogcn. 



Hymenolepis (hi-men-o-lep/ -is). See Parasites, Table 

 of (Illus. Diet.). 



Hymenopterism (hi-men-op'-tur-izm) [Hymenoptera, 

 an order of insects]. Poisoning from the stings of 

 wasps, bees, hornets, or other hymenopterous insects. 



Hyocholalic (hi-o-ko-la'-lik) \ic, a pig; jo/jy, bile]. 

 Derived from pig's bile, as hyocholalic acid. 



Hyolaryngeal yhi-o-lar-in'-je-al). Related to or con- 

 nected with the hyoid bone and the larynx. 



Hyomandibular (hi-o-man-dib / -u-lar). Relating to 

 the hyoid bone and the inferior maxilla. 



Hyomental (hi-o-ment'-al). Relating to the hyoid 

 bone and the chin. 



Hyoscyamin. (See Illus. Diet. ) H. Hydrobromate, 

 yellowish-white amorphous masses, with nauseous 

 taste and odor of tobacco. It is mydriatic, hypnotic, 

 and sedative. Dose, T ^ 6 ' 5 gr. (0.CO05-O.001 gm.) 

 several times daily. As hypnotic for insane, dose, J— 

 i gr. (0.008-0.016 gm. ). H., Pseudo-, C 17 H M N0 3 , 

 that obtained from Duboisia viyoporoides, R. Br., 

 forming yellow needles with acrid, bitter taste, soluble 

 in alcohol and chloroform, melting at 134 C. It is 

 sedative and antispasmodic. Dose for the sane, -j4}r~ 

 ?V ST- (0.C005-0 001 gm. ). Inj. for insane, 35— rV 

 gr. (0.002-0.006 gm. ). 



Hyoscypicrin (hi-os-e-pik'-rin). A bitter glucosid from 

 Hyoscyamus niger, L. , forming a yellow amorphous 

 mass soluble in water and alcohol ; it splits into 

 grape-sugar and hyoscyretin by action of hydrochloric 

 acid. 



Hyospondylotomy (hi-o-spon-dil-ot'-o-me) [voeidr/c, 

 hyoid; c~ 6v6v?.oc, a vertebra; ripveiv, to cut]. In 

 veterinary practice, puncture of the laryngeal pouch. 



Hyovertebrotomy (hi-o-vur-te-brof '-o-me). See Hyo- 

 spondylotomy. 



Hypacidemia (hi-pas-id-e' -me-ah) [i~d, under; acid- 

 aiua, blood]. Deficiency of acid in the blood. 



Hypacidity (hi-pas-id' -it-e) [yrzo, under; acidity]. 

 Subacidity; deficiency in acid constituents. 



Hypactic (hi-pak / -tik) [irxayeiv, to carry down]. 

 Slightly purgative. Syn., Hypagog. Cf. Lapactic. 



Hypaemia. See Hyphemia (Illus. Diet.). 



Hypagog (hi'-pah-gog). See Hypactic. 



Hypantrum (hi-pan' '-trum) \y~6, under; avrpov, a 

 cavern]. A recess in the vertebral neural arch which 

 lodges a hyposphene. Cf. Hyposphene ; Zygantrum. 



Hypaphorin (hi-paf'-or in). A crystalline alkaloid 

 derived from the seeds of Erythrina lithosperma', 

 Blume., forming colorless crystals, dextrogyre and 

 soluble in water, decomposing at 220 C. without 

 melting. 



Hyparterial (hi-par-te' -re-al) [fc?6, under; artery - ]. 

 Situated beneath an artery. 



Hypasthenia (hi-pas-the / -ne-ah) [iVd, under; aadeveia, 

 weakness]. Loss of strength in a slight degree. 



Hypatmism (hi'-pat-mizm) \inzo, under ; dr/idc, vapor]. 

 Fumigation. 



Hypaxial [hi-paks'-e-al) [yiro, under; axis]. Situated 

 beneath or ventrad of the body-axis. Cf. Epaxial. 



Hypectasia, Hypectasis (hi-pek-ta'-ze-a/i, hi-pek' -la- 

 sts) [trrd, under; ihraair, a stretching]. Slight or 

 moderate distention. 



Hypeosinophil (hi-pe-o-sin' -o-fil) \vtt6, under; eosino- 

 phil]. I. A histologic element which does not stain 

 completely with eosin. 2. Staining imperfectly with 

 eosin. 



Hyperabduction (hi-pur-ab-duk' '-shun). See Super- 

 abduction (Illus. Diet.). 



