GUACO 



5.35 



(.1 MM A 



Guaco (givaw'-kd) [S. Amer.]. Theleavesof MUtania 

 guaco, much used in S. America for snake-bites, h is 

 thought to be of value in chronic rheumatism. Dose 

 of the rid. ext. 3 ss-j. Unof. Various species of Mika 

 nia and Aristolochia are locally known by tin.-, name. 



Guaiac (gwi'-ak) [S. Amer]. Sec Guaiacum. G- 

 mixture, Fenner's. The Tinctura antacrida [N. 

 F.], a tincture of the resin of guaiacum and < anada 

 turpentine, in which each lluidram contains ' -, of 

 a grain of the corrosive chlorid of mercury. G.- 

 test. Sec Tests, Table of. 



Guaiacol [gwi'-ak-ol) [S. Amer.], C 7 H 8 2 . A sub- 

 stance that occurs in wood tar, and is also produced on 

 heating pyrocatechin with potassium hydroxid and po- 

 tassium methyl-sulphate to i8o° C. It is a colorless 

 liquid that boils at 200 ('., and has a specific gravity 

 of 1. 117. It is readily soluble in alcohol, ether, and 

 acetic acid, and is recommended instead of creasote in 

 pulmonary tuberculous Dcse m j-ij, or gr. 

 SciolIa(l893 (found that topical a] plications of guaiacol 

 reduced bodily temperature, and J. Solis-Cohen and 

 1 >a Costa (I '()') have applied the method successfully 

 in cases of high temperature in ty] hoid feverand other 

 febrile diseases. The dose is about 30 drops slowly 

 rubbed on the skin of the abdomen or thigh. Unof. 



Guaiacum {gwi'-ak-utn) [Guaicauans, a tribe of S. A. 

 Indians]. Lignum vitae. The heart of the tree, and also 

 the oleoresin, of G. officinale and G. sanctum, a 

 prompt diaphoretic, expectorant, and alterative, efficient 

 in tonsillitis, neuralgic dysmenorrhea, amenorrhea, and 

 rheumatism, and formerly much used as an antisyphili- 

 tic. Dose gr. x-xxx. G., Mist. (B. P.) Dose ifj-iss. 

 G, Resina, the resin of the wood of G. officinale. G., 

 Tinct., strength 20 percent. Dose rr^v-^j in mucil- 

 age. G., Tinct., Ammoniat., contains guaiac 20, and 

 aromatic spirit of ammonia 80 parts. Dose n\v— 3 ss - 



Guanin (gwaaZ-ntn) [Sp. , guano, dung] , C 5 H 5 N 5 0. 

 A leukomalne discovered by Unger in 1844, as a con- 

 stituent of guano. Since then it has been found in 

 small quantities in the pancreas, liver, and muscle ex- 

 tract, and has been shown to be one of the decomposi- 

 tion products of nuclein in both animal and vegetable 

 organisms. In the case of the lower animals it is evi- 

 dently the end-product of katabolic change. It is a 

 white, amorphous powder, insoluble in water, alcohol, 

 ether, and ammonia. Guanin and kreatin appear to 

 mutually replace each other — both being substituted 

 guanidins. Guanin is an intermediate product in the 

 formation of urea. It is non-poisonous and a muscle- 

 stimulant. See Capranica's Tests. 



Guano [gwaw'-no) [Peruv., huanu, dung]. The ex- 

 crement of sea-fowl found on certain islands in the 

 rainless regions of the Pacific Ocean. It consists es- 

 sentially of alkaline urates and phosphates. It is used 

 externally in certain skin-diseases. Unof. 



Guarana igwaw-rah' '-nah\ [the name of a tribe of S. A. 

 Indians]. A dried paste prepared from the seeds of 

 Paullinia cupana, found in Brazil. It contains an alka- 

 loid, guaranin, C 8 H 10 N 4 < >._,. II.,< >, identical with caffein. 

 It is employed chiefly in nervous sick-headaches. The 

 commercial preparations are not always trustworthy. 

 Dose of the lid. ext., n^v-xxx ; of guaranin gr. j-iij ; of 

 the solid ext. gr. iij-x ; of the tincture (1 in 4) ^ss-j. 



Guard (gara) [garder, to keep]. An appliance on 

 a knife to prevent too deep incision. G.-cell, in 

 biology, one of the two semilunar epidermal cells, 

 inclosing the opening of a stoma in plants. 



Guardian-cells {gar* -de-an-seh \. Same as Guard-cell. 



Guarinari's Agar-gelatin. A culture-medium com- 

 posed of agar agar 3-4 gms., -odium chlorid 5 gms. , 

 peptone 25-30 grms. , gelatin 40-60 gms., water 50 

 c.c. , meat-infusion 950 c.c. 



Guaycuru {guri-ku-ru') [Sp.]. The S. American name 

 ol various plants, asStatica bra ill n i and S. antarc- 



ti<a. The root is a very powerful astringent. Unof. 



Gubernaculum testis [gu-ber-nak' -u-lum tes / -tis) 

 [I..]. The conical -shaped cord attached above the 

 lower em 1 of the epididymis and governing the descent 

 of the testes in fetal growth. 



Gubler's Tumor. A prominence over the carpus of 

 the dorsum of the hand inchronii wrist drop from lead- 

 poisoning. See Signs and Symptoms , 'J a hie of. 



Gudden's Atrophy Method. A method of demon- 

 strating the connection of a nerve trunk with a center. 



It a porti >i a m rve trunk i- destroyed in a young, 



growing animal, the peripheral libers will undergo 

 Wallerian degeneration, while the proximal cells and 

 libers connected with the destroyed portion will atro- 

 phy and disappear. G.'s Commissure, a mass of fibers 

 forming tin uppi 1 part of the optic tracts. 



1 hey ( annot be demonstrated in man except in cases 

 of complete degeneration of the optic libers proper. 

 G.'s Ganglion, the cephalo-dorsal ganglion of the 

 mamillary body of the brain. G.'s Law. See 

 Law. 



Guerin's Glands. See Gland. G.'s Method. See 

 Treatment , Method, 



Guernsey Blue. See Pigments, Conspectus of. 



Guettard, Glands of. See Gland. 



Guidi, Canal of. See ( 'anal. 



Guignet's Green. Same as Chrome-green. 



Guillotine (git'-o-tin) [after Dr. J. I. Guillotin~\. A 

 surgical instrument for excision of the tonsils or growths 

 in the larynx, etc. 



Guimet Blue. Same as French Blue. 



Guinea {gin'-e) [African]. The name of a district on 

 the west coast of Africa. G. Fever, a form of inter- 

 mittent fever. G. -green. See Pigments, Conspectus 

 of. G. Pepper. See Grains of Paradise. G. -pig, an 

 animal of the genus Cavia, used in bacteriologic in- 

 vestigation. G.-worm, the Filaria medinensis, a 

 nematode worm of tropical countries, that in the 

 human tissues in which it burrows may, unless re- 

 moved, develop to a length of several feet, produc- 

 ing inflammatory ulceration. See Thread-worm. G.- 

 worm Disease. See Dracontiasis. 



Gula (gu'-laK) [L.: pi., Gula\. The gullet; the neck 

 and throat, or the pharynx and esophagus. In biology: 

 I. An exoskeletal piece on the under side of the head 

 of certain insects, behind thementum and between the 

 genae. 2. The upper portion of the front of the neck 

 of a bird. 



Gulancha {goo-Ian' '-hah) [F.. Ind.]. The plant, 

 Tinospora cordifolia, of India. Its stems and roots 

 are diuretic, tonic, and antiperiodic. Unof. 



Gular (gu'-lar) [gula, the gullet]. Pertaining to the 

 throat, pharynx, or gula. 



Gulinula {gu-lin' '-u-lah) [gula. throat]. In biology, 

 applied by Hyatt to that stage in the development of 

 an actinozoan in which the actinostome or gullet is 

 formed; it follows the hydroplanula stage. 



Gullet {gul'-et). See 



Gum [MTL.,gumme, gum]. A name loosely applied to 

 the concreted juice-, of plants. Chemically, a substance 

 yielding mucic acid when treated with nitric acid. S 

 also, Gums, and the names of the various gums. G. 

 Arabic. See Acacia. G. Benjamin. See Ben 

 G.-boil, abscess of the gum. G. Dammar. See 

 Dammar. G. -plant. See Grindelia. G. -resins. 

 See A'esins. G. Tragacanth. See Tragacanth. 

 G.-wood Tents. See Tupelo. 



Gumma (gum'-ah) [Fr. , gomme: //. , Gummata~\. 

 A soft, elastic tumor resulting from a peculiar kind of 

 caseation of tertiary syphilitic inflammatory deposits. 



