HABENULA 



286 



HEALTH 



H 



Habenula. (See Illus. Diet.) H. denticulata. See 

 Huschke, Auditory Teeth of ( Illus. Diet.). H., Hal- 

 ler's, the slender cord formed by the obliteration of the 

 canal which during early life connects the cavity of the 

 peritoneum with that of the tunica vaginalis. Syn. , 

 Cloquet ' s liga inent. 



Haemaphysalis (he-ma-fz'-al-is) [aifia, blood; Qvoa?Jc, 

 a bladder]. A genus of ticks. H. Leachi, the com- 

 mon dog tick of South Africa, transmits blood-parasites 

 causing malignant jaundice. 



Haffkine's Method. See under Immunization. H.'s 

 Prophylactic, H.'s Serum or Virus. See under 

 Serum. 



Haffkinin (Jiaf'-kin-in). Haffkine's plague serum. 

 See Serum. 



Hagey-cure. -See under Cure. 



Hair. (See Illus. Diet.) H.-ball. See sEgagropilus 

 (Illus. Diet.). H.-cup, the depression at the exit of 

 the hairs of the body. H., Unna's Papillary, a 

 complete hair and hair-follicle. 



Halichthyotoxin [hal-ik-thi-o-toks' '-in) [d/.c, sea; IxP'vQ, 

 fish ; toS-ikov, poison]. A poisonous alkaloid isolated 

 from stale sturgeon. 



Halichthyotoxism [hal-ik-thi-o-toks' '-izm). Huse- 

 mann's name for Ichthyotoxism. 



Halimetry (hal-im'-et-re\ [d/£, salt; /lerpov, a measure]. 

 The process of determining the quantity of salts in a 

 mixture. 



Haliplankton (hal-e-plaui' '-ton) [a/.g, the sea ; - ir/.ayx- 

 t6q, wandering]. In biology the totality of the swim- 

 ming and floating population of the ocean as opposed 

 to the fresh-water limnoplankton. See Plankton. 



Hallucal. (See Illus. Diet.) H. Pattern, the con- 

 spicuous pattern of markings upon the thenar region 

 of the great toe. 



Hallucination. (See Illus. Diet.) 2. Any supposed 

 sensory impression which has no objective counterpart 

 within the field of vision, hearing, etc. [Myers.] 

 H., Delusive, H., Falsidical, one for which there is 

 no corresponding real event. H.s, Maury's, the 

 illusions of the intermediate state between sleeping and 

 waking or in that analogous condition of half-conscious- 

 ness, as in hysteria, mental confusion, etc. H., Ve- 

 ridical, one that corresponds to a real event happening 

 elsewhere. 



Hallucinatory (hal-u'-sin-a-tor-e). Affected with or 

 having the character of a hallucination. 



Halobios (hal-o-bi' -os) [dAc, the sea ; (Slog, life]. The 

 totality of the marine flora and fauna in opposition to 

 limnobios, the organic world of fresh water, and geobios, 

 the totality of the terrestrial plant and animal world. 



Halology (Aal-ol'-o-je) [d/c, salt; /o/oc, science]. The 

 chemistry of salts. 



Haloscope (hal'-o-skdp) [d/.f, salt ; okokeiv, toexamine]. 

 An apparatus for determining the amount of salt in a 

 solution. 



Halteridium (hal-tnr-id'-e-um) [d?.rf/f>eg, weights held 

 in the hand when leaping]. A genus of parasitic coc- 

 cidia which infest the blood-discs of birds. See Para- 

 sites, Table of Animal (Illus. Diet.). 



Hamiform (hdin'-e-form). See Ilamose. 



Hamilton's Test. See under Signs. 



Hammarsten's Theory of Blood-coagulation. See 

 under Blood. 



Hammer. (See Illus. Diet.) 2. An instrument for 

 striking. H., Mayor's, one with rounded faces to 

 produce counterirritation on the skin by application 

 when heated. H., Neef or Wagner, an interrupter 



or circuit breaker employed with many induction coils. 

 H. -palsy, H. -spasm. See under Palsy. H., Per- 

 cussion, a plessor. H. -percussion. See under 

 Percussion. 



Hamose {Jiam'-oz) \_hamus, a hook]. Hooked at the 

 apex. 



Handicraft-spasms. See Fatigue Diseases (Illus. 

 Diet. ). 



Hapalonychia (hap-al-o-nik J '-e-ah) \_a~a7.6c, soft to the 

 touch ; bvvij, nail]. A soft, uncornified condition of 

 the nails. 



Haptic (hap'-tik) [enrrog, subject to the sense of touch]. 

 Pertaining to touch ; tactile. 



Haptine {hap' -ten) [aTrreiv, to bind]. In Ehrlich's 

 lateral-chain theory, any thrown-off receptor. 



Haptogen {Jiap f -to-jen) [a-reiv, to bind; yevvav, to 

 produce]. A pellicle forming around fatty matter 

 when brought into contact with albumin. Syn., Uap- 

 togenic membrane. 



Haptophil (hap'-to-fil) [atvrEiv, to bind; (j>i2eiv, to 

 love]. In Ehrlich's side-chain theory applied to a 

 receptor having an affinity for the haptophore of a 

 toxin. 



Haptophore [hap / -to-for) [citttelv, to bind; ipepeiv, to 

 bear]. That complex of atoms of a toxic unit which 

 unites it to the cell receptor. 



Haptophoric, Haptophorous [hap-tof'-or-ic, -us). 

 Combining; pertaining to haptophores. H. Group. 

 See Haptophore. 



Harderian [har-de'-re-an). Described by John Jacob 

 Harder, a Swiss anatomist (1656-1711). 



Harmattan (har-mat'-an). A local hot wind on the 

 coast of Guinea which blows during December, Jan- 

 uary, and February, from the interior out to sea. It is 

 said to cause cessation of endemic fevers. Cf. Mistral, 

 Sirocco, Simoon, Solano, Khamsin, Norther, Foehn. 



Harmel (har'-mel '). Wild rue. See Peganum Iiar- 

 mala. 



Harmin (har / -min). C 1S H I2 N 2 0. An alkaloid found 

 by Fritsche (1847) in Peganum harmala, L., occur- 

 ring in colorless prisms. 



Harrowing (har'-o-ing). The action of teasing the 

 fibers of a nerve or tearing them apart with any blunt 

 instrument. It has been used in the treatment of 

 sciatica. Fr. Hersage. 



Hatching-cradle, Tarnier's. See Incubator, Tamier*s 

 (Illus. Diet.). 



Haversian (kav-ur'-se-an). Described by or named 

 for Clopton Havers, an English anatomist who 

 lived in 1691. 



Hazelin {ha'-zel-in). A proprietary liquid said to be 

 distilled from leaves and twigs of witch hazel, llama- 

 melis virginica. Dose, 1-5 gr. (0.06-0.32 gin.). 



Head. (See Illus. Diet.) H., Scald, H., Scalled, 

 any scabby disease of the scalp. H., Swell, actino- 

 mycosis. 



Headache. (See Illus. Diet.) H., Gunshot, that 

 arising from the concussion of gun-firing. It is said 

 that a piece of India rubber held between the teeth 

 prevents it. H., Ocular, pain in and about the head 

 that results from organic disease in, or from impaired 

 function of, any part of the visual apparatus, 



Healer {hil'-er) [ME., Helen, to heal]. One who 

 effects cures. H., Natural, one supposed to possess 

 personal magnetism capable of overcoming disease. 



Health. (See Illus. Diet.) H., Bill of, the official 

 document issued by quarantine or other public health 

 officers, which grants freedom from sanitary restraint. 



