ARNANDON GREEN 



110 



ARSENICAL 



Arnandon Green. Same as Mittler's Green. 



Arnatto (ar-nat'-o). See Annotto. 



Arnica (ar' -nik-ah) [L.: gen., Arnica']. A genus of com- 

 posite-flowered plants. The name in medicine de- 

 notes the plant commonly known as " Leopard's 

 bane," A. montana. Both flowers and roots are used 

 in medicine. Its properties are probably due to an 

 alkaloid, trimethylamin, C 3 H 9 N. In small doses it is 

 a cardiac stimulant ; in larger doses a depressant. In 

 toxic doses it frequently causes death. It is a popular 

 remedy, when locally applied, for sprains, bruises and 

 surface wounds, and is valuable also in typhus and 

 typhoid fevers as an antipyretic. A., Emplastrum, 

 contains ext. of root 33, resin plaster 67 parts. A., 

 Ext. Radicis. Dose gr. j-iij. A., Ext. Rad. Fid. 

 Dose TT\v-xx. A., Infusum, 20 parts flowers, 100 

 parts water. Superior to the tincture for local use. A., 

 Tinct., 20 per cent. Dose TTlv-xxx. A., Tinct. Rad., 

 10 per cent. Dose tt^v-xxx. Trimethylamin, (unof.). 

 Dose gr. ij-iij in syrup. Arnicae flores, arnica flow- 

 ers. Arnicae radix, the root of arnica. 



Arnicin {ar' '-nis-in) [arnica], C 20 H 30 O 4 . A brownish, 

 bitter glucosid extracted from the flowers of Arnica 

 montana. 



Arnold's Convolution. See Convolutions, Table of. 

 A. Fold, valvula lachrymalis superior, a fold of the 

 mucous membrane seen in the lachrymal sac. A. 

 Ganglion. See Ganglia, Table of. A. Nerve. See 

 Nerves, Table of. A. Plexus. See Plexus. 



Arnott's Method. See Treatment, Methods of . A. 

 Mixture. See Frigorific Mixture. A. Ventilator. 

 See Ventilation. 



Aroma {ar-o'-mah) [apu/ia, spice]. The volatile fra- 

 grant or odorous emanation of certain vegetable sub- 

 stances. 



Aromatic (ar-o-maf '-ik) [apufia, spice]. 1. Having a 

 spicy odor. 2. A substance characterized by a frag- 

 rant, spicy taste and odor, as cinnamon, ginger, the es- 

 sential oils, etc. A stimulant to the gastro-intestinal 

 mucous membrane. 3. A qualification applied to a 

 series of carbon compounds originating from a nucleus 

 composed of six carbon-atoms, C 6 H 6 . Their stability 

 is relatively great as compared to the fatty bodies. A. 

 Acids, those of the benzin-group of hydrocarbons. 

 A. Compound, any benzyl-derivative. A. Fid. Ext., 

 aromatic powder 100, alcohol q. s. A. Group, a 

 series of hydrocarbons having the composition C 10 - 

 H| 6 . A. Powder. See Cinnamomum. A. Vine- 

 gar, any mixture of aromatic oils with vinegar. It is 

 used as a stimulating agent. See Acetum. 



Aromin (ar-o f -min) [apufia, spice]. An alkaloid ob- 

 tainable from urine, after creatinin, etc., have been 

 removed from the mother-liquor. When heated it 

 emits a fragrant odor. 



Arquatus {ar-kwa'-tus) [L., a rainbow]. Showing 

 several colors. A. morbus, an old name for jaun- 

 dice, from the discoloration of the skin; rainbow 

 disease. 



Arrack (ar f -ak) [Ind.]. Any alcoholic liquor is called 

 arrack in the East, but arrack proper is a liquor dis- 

 tilled from toddy, malted rice, or dates. 



Arrak (ar'-ak). See Arrack. 



AiTector {ar-ek' -tor) [L., an erector]. A name applied 

 to certain muscles. A. pili Muscle, a fan-like ar- 

 rangement of a layer of smooth muscular fibers sur- 

 rounding the hair follicle, whose contraction erects 

 the follicle and produces cutis anserina or " goose- 

 skin." 



Arrest (ar-est'\ [ad, to; res/are, to withstand]. Stop- 

 page, detention. Arrested development, is when 

 an organ or organism fails in its normal evolution, 

 stopping at the initial or intermediate stages of the 



process. Arrested head, when in parturition the 

 child's head is hindered but not impacted in the pelvic 

 cavity. 



Arrestation {ar-es-ta' '-shun) . Same as Arrest. 



Arrhea {ah-re / -ah) [d priv.; poia, a flow]. The cessa- 

 tion or suppression of any discharge. 



Arrhenotocia {ar-en-o-to' '-se-ah) [appr/v, male ; t6koc, 

 a bringing forth] . A form of parthenogenesis in which 

 without coitus male eggs are deposited, as in bees. 



Arrhinia {ah-rin' '-e-ah) . Same as Arhinia. 



Arrhizous {ah-ri'-zus) [a priv.; p/fa, a root]. In 

 biology, destitute of roots or rhizoids, as parasitic 

 plants, certain mosses, hepaticse, etc. 



Arrhythmia {ah-rith' -me-ah) [d priv. ; pvd/x6g, rhythm]. 

 Absence of rhythm ; chiefly used in the expression ar- 

 rhythmia cordis, denoting irregularity or lack of rhythm 

 in the heart's action. See Cardiac Rliythm. 



Arrhythmic (ah-rith'-mik) [a priv. ; pvtip,6g, rhythm]. 

 Without rhythm ; irregular. 



Arrhythmous {ah-rith' -mus). See Arrhythmic. 



Arrhythmy (ah-rith' -me) . Same as Arrhythmia. 



Arrow-poison (ar'-o-fioi'-zun). See Curare and Gua- 

 chamaco. 



Arrowroot (ar'-o-roof) [ME., aroia ; roote]. A kind 

 of starch derived from Maranta arundinacea of the 

 West Indies, Southern States, etc. It is a popular 

 remedy for diarrhea, and is widely used as a food. 

 Many other starchy preparations are sold as arrow- 

 root. 



Arsenate, or Arseniate (ar'-sen- at, ar - se f ■ ne - at) 

 [arsenium]. Any salt of arsenic acid. Ferrous 

 arseniate, arseniate of iron, sparingly used in medi- 

 cine : it is the ferri arsenias of the B. P. It is a 

 tasteless, greenish powder, combining the effects of 

 iron and arsenic ; used largely in anemia and skin 

 diseases. Dose gr. jg-j. 



Arseniasis (ar sen-i'-as-is). Same as Arsenism. 



Arsenic, Arsenicum, or Arsenum (ar'-sen-ik, ar- 

 sen'-ikum, or ar-se'-num). As = 75 '■> quantivalence 

 in, v. A non-metal having a metallic luster and crys- 

 talline structure. In small doses it is a stomachic and 

 general tonic, promoting appetite and cardiac action, 

 and stimulating mental activity. It is of great value in 

 irritative dyspepsia, and is sometimes used internally to 

 blanch and clear the skin. In larger doses it creates 

 skin-eruptions and behaves as a violent corrosive poison, 

 acting with cumulative effect. Externally, it is a pow- 

 erful escharotic, used in cancer. Only the salts and 

 oxids are used in medicine. A. acid., arsenous acid, 

 white arsenic, " ratsbane," As 2 3 . Dose gr. $V" tV 

 A., acid., liquor. (Liq. arsenici hydrochlorici, B. P.), 

 a 1 per cent, solution of the acid in hydrochloric 

 acid and distilled water. Dose n\ij-x. Ferri 

 arsenas, Fe 3 As 2 8 . Dose gr. T V-£- Liq. Ar- 

 senici hydroehlor. (B. P.). Dose tTLij— viij. Po- 

 tassii arsenit., Liq. (Liquor Arsenicalis, B. P.). 

 Fowler's solution, contains A. acid 1, potass, bicar- 

 bonate I, comp. tinct. lavender 3, and distilled water 

 q. s. ad 1 00 parts. Dose n\jj-x. Sodii arsenas, 

 Na,HAs0 4 .7H 2 0. Dose of the dried salt gr. jW*. 

 Sodii arsenat., Liq., Pearson's solution. Dose, 

 TTLij xv. A. iodid, Asl v Dose gr. 2 \f-L A. et 

 hydrargyri iod., Liq., liquor of the iodid of arsenic 

 and mercury, Donovan's solution, contains A. iodid 

 I, mercuric iodid I, distilled water loo parts. Dose 

 rnjj-x. A. bromas, AsBr, valuable in diabetes. 

 Dose gr. ^ v . A. brom., Liq., Clemens' solution, a 

 one per cent, solution of the arsenitc of bromin. Dose 

 TT\J-iv. The tests for arsenic are Fleitmann's, Marsh's, 

 and Reinsch's, for which see Tests, Table of. 



Arsenical (ar-sen'-ih-al) [arsenum, arsenic]. Per- 

 taining to arsenic. A. Devitalizing Fiber, used 



