HYDRO-ELECTRIC 



584 



HYDRONAPHTHYLAMIN 



Hydro -electric (hi-dro-e-lek' -trik) [vdup, water ; t)Xek- 

 rpov, electricity]. Pertaining to electricity developed 

 by the physical action of fluids or in connection with 

 water. H. Bath, a bath in which the metallic lining 

 of the tub is connected with one pole of a battery, the 

 other being in contact with the person of the patient. 



Hydrofluoric Acid (hi-dro-flu-or* '-ik) . See Acid. 



Hydrogaster (hi-dro-gas' -ter). Synonym of Ascites. 



Hydrogen (hi f -dro-jen) [vdup, water ; yewav, to pro- 

 duce]. H = I. Quanti valence I. A gaseous element, 

 one liter of which weighs .0896 gram. It is 

 feebly basic and occurs in nature combined with oxy- 

 gen in the form of water H 2 0. It has been liquefied 

 at a temperature of — 286 F. under a tension of 650 

 atmospheres — a pressure of about 4.7 tons per square 

 inch. In combination with carbon, oxygen, and 

 nitrogen, it forms a multitude of radicles formerly 

 known as " organic" compounds, but now often syn- 

 thetically formed. It is used largely in the qualitative 

 determination of arsenic and antimony, and for com- 

 bustion with oxygen to produce intense heat. It has 

 also been used by inhalation in pulmonary tuber- 

 culosis. See Elements, Table of. H. peroxid, or 

 dioxid, an unstable compound having the composition 

 H 2 2 . It is a powerful antiseptic and germicide, and 

 is used as a disinfectant in diphtheria, glandular 

 swellings and suppurative inflammations, and as an 

 antispasmodic to relieve the paroxysms of whooping- 

 cough. It is the basis of most hair-bleaching solu- 

 tions. Dose ^ss-ij. Unof. H. d., Aqua, solution of 

 hydrogen dioxid ; contains 3 per cent, by weight of the 

 pure dioxid. H. sulphid. See Acid Hydrosulphuric. 



Hydrogenesis (hi-dro-jen' '-es-is) [vdup, water; yewav, 

 to produce: //. Hydrogeneses~\. I. The collection or 

 formation of a watery fluid. 2. Any disease in which 

 there is a predominance or degeneration of mucous 

 secretion, fat, bile, or milk. 



Hydrohematocele (hi-dro-hem' -at-o-sel) [vdup, water; 

 alfia, blood; ktjAtj, tumor]. Hematocele associated 

 with hydrocele. 



Hydrohemia (hi-dro-hem f -e-ah). Same as Hydremia. 



Hydrohemostat (hi-dro-hem' -o-stat) [vdup, water; 

 aifia, blood ; ffraroc, stopped]. A device for stopping 

 hemorrhage by means of hydrostatic pressure. 



Hydrohemothorax (hi-dro-hem-o-tho / -raks) [vdup, 

 water; aifia, blood; dupa^, thorax]. An effusion of 

 hemorrhagic fluid into the pleural cavity. 



Hydrohymenitis (hi-dro-hi-men-i' '-tis). See Hydry- 

 menitis. 



Hydrohystera (hi-dro-his' -ter-ah). See Hydrometra. 



Hydroid (hi'-droid) [vdup, water; eldog, form]. 1. 

 Like water. 2. Living in water. 



Hydrolactometer (hi-dro-lak-tom' -et-er) [vdup, water ; 

 lac, milk ; fierpov, measure] . An instrument used in 

 estimating the percentage of water in any given sam- 

 ple of milk. 



Hydrolatum (hi-dro-la f -turn) [vdup, water: gen., Hy- 

 drolati ; pi., Hydrolata\ • A medicated water. 



Hydrolein (hi-drol' -e-in) [vdup, water; oleum, oil]. 

 A proprietary remedy consisting of an emulsion of cod- 

 liver oil with pancreatin and borax. 



Hydrology {hi-drol* '-o-je) [vdup, water; ?dyoc, sci- 

 ence]. A treatise on the nature and uses of water. 



Hydrolymph (hi f -dro-limf) [vdup, water ; lympha, 

 water]. A term applied to the blood of certain ani- 

 mals which is composed largely of the salt or fresh 

 water in which they live, and containing a small 

 amount of corpuscular elements. 



Hydrolyst (hi' '-dro-lisl) [vdup, water; "kvaic, dis- 

 solving]. A substance that, like sulphuric acid, 

 diastase, emulsin, etc., induces hydrolysis ; an 

 hydrolytic agent. 



Hydrolyte (hi' -dro-llt) [vdup, water; "kvcig, dissolving]. 

 The substance hydrolyzed. 



Hydrolytic (hi-dro-{it' '-ik) [vdup, water ; Tiveiv, to dis- 

 solve]. Pertaining to the decomposition of water, or 

 the liberation of water during a chemic reaction. H. 

 Ferments, those causing a combination with the ele- 

 ments of water in the substances they decompose. 



Hydroma (hi-dro' '-muh) [vdpufia ; vdup, water; bpa, 

 a tumor: //. , Hydromata\ A tumor containing 

 water. A cyst or sac filled with water or serous fluid. 

 Also, an edematous swelling. Also, the cystic dilata- 

 tion of a lymphatic of the neck. 



Hydromania (hi-dro-ma' -ne-ah) [vdup, water ; fiavia, 

 madness]. I. Intense or maddening thirst. 2. Ma- 

 nia with desire for suicide by drowning. 



Hydromel (hi f -dro-mel ) [vdup, water ; peki, honey]. A 

 fermented mixture of honey and water, whether medi- 

 cated or not ; a kind of mead or metheglin. 



Hydromeningitis (hi-dro-men-in-ji' -tis) [vdup, water ; 

 fiTJviyl;, a membrane ; trig, inflammation]. Inflam- 

 mation of the membranes of the brain or cord, ac- 

 companied by effusion of watery fluid. 



Hydromeningocele (hi-dro-men-in' '-go-sti) [vdup, 

 water; fiyviyg, membrane ; ktjAt/, a tumor]. A cystic 

 tumor of the meninges, protruding through the skull. 

 Also, a cystic tumor in the arachnoid cavity or in the 

 continuation of the subarachnoid space. 



Hydrometer (hi-drom' -et-er) [vdup, water ; perpov, a 

 measure]. An instrument for determining the specific 

 gravity of liquids or solutions containing water. 



Hydrometra (hi-dro-me' -trah) [vdup, water; prjTpa, 

 the womb]. A collection of water or mucus in the 

 womb. It may result from congenital atresia in in- 

 fants, but usually follows an endometritis with stenosis 

 of the cervix. 



Hydrometrectasia (hi-dro-me-trek-ta' '-ze-a/i) [vdup, 

 water ; fif/rpa, womb ; enraoic, a stretching out]. 

 Hydrometra causing distention of the uterus. 



Hydromicrencephalia (hi-dro-mi-kren-sef-a' -le-ah) or 

 Hydromicrencephaly (hi - dro - mi - kren - sef f - al-e) 

 [vdup, water; ptupdg, small; eyneipaAog, the brain]. 

 Micrencephaly leading to, or complicated by, a serous 

 effusion within the cranial cavity. 



Hydromphalocele ( hi-drom-fal' '-o-sel) [vdup, water; 

 b/Mpalog, navel ; nr??.?}, hernia]. Cystic tumor in the 

 sac of an umbilical hernia. 



Hydromphalus (hi-drom' -fal-us) [vdup, water ; 6pxf>a- 

 X6g, navel]. A tumor at the navel distended with 

 water. It may arise either from ascites or umbilical 

 hernia. 



Hydromyelia (hi-dro-mi-e' '-le-ah) or Hydromyelus 

 (hi-dro-mi' '-el-us) [vdup, water ; /iveMg, marrow]. 

 Dilatation of the central canal of the spinal cord 

 with an accumulation of fluid. It may be moderate 

 or extreme. 



Hydromyelitis (hi-dro-mi-el-i'-tis) [vdup, water ; five- 

 'A,6g, marrow; trie, inflammation]. Same as Ilydror- 

 rhachis interna. 



Hydromyringa, or Hydromyrinx (hi-dro-tnir-in'-gaA 

 or hi-dro-mi' '-rinks) [vdup, water; myrinx, the tym- 

 panic membrane]. I. The distention of the mem* 

 brana tympani with water effused within its substance. 

 2. Less correctly, the same as Hydrptympanum. 



Hydronaphthol (hi-dro-naf '-thol) [vdup, water ; 1 

 asphalt]. A proprietary preparation recommendnl as 

 an odorless, non-poisonous, and non-corrosive antisep- 

 tic. It is regarded by some as identical witli beta- 

 naphthol. Dose gr. ij-v. Unof. 



Hydronaphthylamin (hi-dro-naf-thil'-am-in) [vdup, 

 water; pd<f>Ha, asphalt; amin~\, C 10 I l r II,. N 1 1 ,■ \ 

 compound, called also tetrahydrobetanaphthylamin ; 

 a solution of I to 5 per cent. , whether used topically 



