HEART 



546 



HEDERIC ACID 



worry, over- work, and loss of sleep. Cardiograms of 

 some pathologic conditions of the heart are appended. 



P, Q. Hypertrophy and dilatation of the left ventricle. E. 



Stenosis of the aortic orifice. F. Mitral insufficiency. L. 



Exophthalmic goiter. 

 (a, b Contraction of the auricles. 6, c. Ventricular systole. 



d, Closure of aor'ic valve, e. Closure of pulmonary valves. 



e,f. Diastole of the ventricle.) 



Heat (Jiet) [ME., heete, heat]. A mode or rate of 

 vibration of ethereal, atomic, or molecular, or wave- 

 motion. Within certain limits of intensity it is essential 

 to the development of all organized beings ; above a 

 certain degree, it is destructive to all organization and 

 life. As regards the body, heat indicates a temperature 

 above 98. 6° F. (37 C. ). In physiology, the period of 

 sexual excitement in the females of many animals. 

 H., Animal, the heat generated within the bodies of 

 living animals by the liberation of the latent heat con- 

 tained in the food. H. -apoplexy. See Insolation. 

 H. -asphyxia. Same as Insolation. H. -centers, 

 certain points situated about the mesal and lateral 

 aspects of the corpus striatum, supposed to have the 

 function of regulating or inhibiting the production of 

 body-heat. H. -eruption. Synonym of Eczema. 

 H. -fever. See Insolation. H., Latent, physiolog- 

 ically, the potential energy existing in a complex 

 proteid molecule, and which is liberated by the sim- 

 plification of the latter, or the katabolic processes of 

 the organism. H., Prickly. See Urticaria. H., 

 Specific. See Specific. H.-spot, a freckle. Also 

 a synonym of Eczema solare. H. -stroke, a nervous 

 affection characterized by sudden syncope, enfeebled 

 circulation and respiration, caused by exposure to 

 intense heat. It is called also Sunstroke. H.-unit, 

 the unit quantity of heat. It is the amount of heat 

 necessary to raise one pound of water through one de- 

 gree of temperature. 

 Heaves (hevz) [ME. , heven, to raise]. A disease of 

 horses, characterized by difficult and laborious respira- 

 tion. It is also called " broken wind.*' 

 Heavy Oil. See Creosote Oil. 



Hebephrenia (lie-be-fre' '-ne-ah) [>//?//, puberty ; 4>pi/v, 

 mind]. A special form of mental derangement 



occurring in young persons at or soon after the age of 

 puberty. 



Hebephreniac (he-be-fre' -ne-ak) [i/fly, puberty ; <ppi/v, 

 the mind]. One who is affected with hebephrenia. 



Hebephrenic (Jie-be-fren' '-ik) [i]fi>i, puberty; typijv, the 

 mind]. 1. Affected with hebephrenia. 2. One who 

 is affected with hebephrenia. 



Heberden's Asthma. See Asthma, and Diseases, 

 Table of. H.'s Rheumatism. See Diseases, Table 

 of. H.'s Nodes. See Nodes, and Signs and Symp- 

 toms, Table of. H.'s Nodosities. . See Signs and 

 Symptoms, Table of 



Hebetic (he-bet'-ik) [^/fyr/zoSc, relating to puberty]. 

 Relating to puberty or to adolescence. 



Hebetude (heb'-e-tud) \_liebetudo ; hebes, blunt]. Dul- 

 ness of the senses and intellect. A term applied to 

 the state of partial stupor in affections of the brain. 



Hebetudinous (heb-e-tu' -din-us) [hebetudo ; hebes, 

 blunt]. Affected with hebetude. 



Hebra's Arsenical Paste. A paste also known as 

 Cosme's Paste. It is used in treating lupus vulgaris. 

 It consists of arsenious acid, 10 grains ; artificial cin- 

 nabar, )4 dram ; ointment of rose-water, % ounce. 

 It is spread on linen and applied accurately by means 

 of a pad and bandage. H.'s Erythema. See Dis- 

 eases, Table of H.'s Pityriasis. See Diseases, 

 Table of H.'s Prurigo. See Diseases, Table of. 



Heckle-cell {Jiek' -l-sel) [ME., hekele, a heckle; cella, 

 a cell]. An epidermal cell having minute, hard, 

 horny projections from its cell-wall. 



Hectic (Jiek'-tik) [ektlk6c, habitual or consumptive]. 

 Habitual. A word now commonly used in connection 

 with certain constant symptoms of pulmonary tuber- 

 culosis, as H. Fever, the febrile symptoms concurrent 

 with pulmonary tuberculosis. H. Flush, the flushed 

 cheek accompanying pulmonary tuberculosis. H. 

 Spot. Same as H. Flush. 



Hectocotylization (Jiek-to-kot-il-iz-a f -sJiwi) [e/carov, a 

 hundred ; kotvItj, a small cup]. In biology, applied 

 to the peculiar sexual modification of the arm of the 

 male cephalopod, or its use as a fertilizing-organ. 



Hectocotylus [hek-to-kot'-il-us) [kmrdv, a hundred; 

 KDTvtoi, a cup]. In biology, a specialized arm in 

 certain male cephalopods, which contains the sperm- 

 cells, and is detached and deposited within the mantle- 

 cavity of the female. 



Hectogram (Jiek' '-to-grani) [eko.t6v, one hundred ; 

 -ypa/j,fia, a weight]. One hundred grams, or 1543.2349 

 grains. 



Hectoliter (hek> '-to-le-ter) [harbv, hundred; "khpa, a 

 pound]. One hundred liters, equal to 22.009 imperial 

 gallons, or 26.4 U. S. gallons. 



Hectometer (Jiek' -to-me-ter) [enarov, hundred; /. 

 a measure]. One hundred meters, or 328 feet, 1 inch. 



Hedeoma (he-de-o / -maJi) [//rfi'r, sweet ; bcp.ii, smell]. 

 American Pennyroyal. The leaves and tops of H. 

 pulegioides, distinguished by their aroma. Its proper- 

 ties are due to a volatile oil. It is stimulant and 

 carminative, and has some value as an emmenagogue. 

 It is useful in the flatulent colic of children. Its odor 

 is extremely repulsive to fleas and mosquitoes. H., 

 Ol. the volatile oil. Dose rt\jj-x. H., Spt., unof., 10 

 per cent, of the oil in alcohol. 



Hedera (Jicd' -er-aJi) [L.]. A genus of woody vines. 

 H. helix, the true or European Ivy. Its wood is 

 used in making issue-peas. A decoction of the 

 leaves has been used as an alterative and antibechic. 

 The berries are purgative and emetic. The gum is 

 emetic and stimulant, and is useful in toothache. I "<>f. 



Hederic Acid (hed-er'-ik) \hedera, European Ivy]. 

 An acid derivable from the leaves of I/edera helix, of 

 which it shares the medicinal qualities. Unof. 



