BUTTERIX 



245 



BYTHUS 



B.-fat. I. The oily portion of the milk of mammalia. 

 2. The fatty portion of butter, made up of the gly- 

 cerids of oleic, palmitic, and stearic acids (the so- 

 called insoluble acids), and the glycerids of butyric, 

 caproic, caprylic, and capric acids (the so-called 

 soluble acids). The average proportion of the in- 

 soluble acids present in butter-fat is 88 per cent., and 

 the average proportion of the soluble acids from five 

 to six per cent. This gives a very important means 

 of distinguishing between a natural butter and oleo- 

 margarin. The pure fat has a sp. gr. of from .910 to 

 .914, and its melting-point varies from 85 to 92 F. 

 B.-fly, a winged pledget or tampon of cotton for 

 vaginal application. B.-fiy Lupus. Synonym of 

 Lupus erythematosus. B. Kidney. See Amyloid 

 Kidney. B.-nut. See Juglans. 



Butterin (but' -er-en) [butyrum, butter]. An artificial 

 substitute for butter, made principally of beef- fat. See 

 Oleomargarin. 



Buttocks (but'-uks) [ME., buttok\ The nates. The 

 fleshy part of the body posterior to the hip-joints, 

 formed by the masses of the glutei muscles. 



Button (but'-un) [ME., boton\. See Furunculus orien- 

 talis. B., Amboyna. See Frambesia. B., Belly, 

 the navel. B., Biskra, the Aleppo Ulcer. B., Cor- 

 rigan's, a steel button-shaped cautery-iron , introduced 

 by Sir J. C. Corrigan (1802-80). B.-bush, the bark 

 of Cephalanthus occidentalis, a tonic, febrifuge, and 

 diuretic. Dose of fld. ext. gss-j. Unof. B.-hole, 

 Mitral. See Funnel, Mitral. B.-hole Operation. 

 See Boutonniere Operation and Operations, Table of. 

 B.-lac. See Lac. B. -maker's Chorea. See Chorea. 

 B. -scurvy, a disease of privation, apparently similar 

 to sibbens or to yaws. B.-snakeroot, the root of 

 Liatris spicata, and of Eryngium yuccafolium ; a 

 stimulant, tonic, diuretic, and emmenagogue. Dose 

 of fld. ext. 3 ss-j. Unof. 



Butyl (bu'-til) [butyrum, butter], C 4 H„. A hydro- 

 carbon alcohol radical, that cannot be isolated, and 

 that occurs only in combination with other radicals. 

 B. Chloral. See Chloral butylicum. B. -chloral 

 Hydrate. See Chloral butylicum. 



Butylamin (bu-til'-am-in) [butyrum, butter; amin\. 

 Any primary amin of butyl. The butylamin of cod- 

 liver oil is said to be one of its medicinal con- 

 stituents. 



Butylene {bu' -til-en) [butyrum, butter], C 4 H 8 . A 

 hydrocarbon belonging to the olefin series. It exists 



in three isomeric forms, all of which are gases at 

 ordinary temperatures. 



Butyric Acid (bu-tir'-ik). See Acid, Butyric. 



Butyrin (bu'-tir-in) [butyrum, butter], C^H^QH-Oj^. 

 A constant constituent of butter, together with olein, 

 stearin, and other glycerids. It is a neutral yellowish 

 liquid fat, having a sharp, bitter taste. 



Butyrone (bu'-tir-on) [butyrum, butter], C ; H u O. 

 Dipropyl ketone. The principal product of the distil- 

 lation of calcium butyrate. It boils at 144 and at 

 20 has a sp. gr. of .82. 



Buxin (buks'-in) [buxus, the box-tree]. Bibirin ; be- 

 beerin ; pelosin ; the alkaloid of Nectandra. It is a 

 white, amorphous powder with a persistent bitter taste ; 

 very insoluble in water, but easily soluble in alcohol and 

 chloroform. Dose of it or its salts, from grains three 

 to six in pill-form. It is used as a febrifuge. Unof. 



Buxton's Apparatus. See Anesthetic. 



Buxus {buks' -us) [L., the box-tree]. A genus of trees 

 affording boxwood. B. sempervirens, the common 

 box or box-tree of Europe and Asia. Its leaves, 

 wood, and oil have been employed in medicine. Unof. 



Buzzi's Operation. See Operations, Table of. 



Byrd's Method. See Artificial Respiration. B. 

 Operation. See Operations, Table of. 



Byrne's Method. See Treatment, Methods of. 



Byrsa (bur'-sah). Same as Bursa. 



Bysma (biz'-mah) [i'vafia, a stopper ; plug : //. , Bys- 

 mata~\. A plug or tampon. 



Byssaceous (bis-a' -she-us) [jUaooc, a variety of flax]. 

 In biology, composed of fine flax-like threads. 



Byssinosis (bis-in-o'-sis) [^iacoc, cotton, flax ; voaoc , 

 disease]. A diseased condition of the lungs due to 

 the inhalation of cotton-dust in factories. 



Byssocausis (bis-o-kav/ -sis) [[ivaooc, cotton ; navoic, 

 a burning].' Cauterization by the moxa ; moxibustion. 



Byssogenous (bis-oj' -en-us) [Q'vcaoc, cotton ; yevr/g, 

 producing]. In biology, producing a byssus. 



Byssus (bis'-us) [3vcooq, cotton, flax]. 1. Charpie, 

 lint, or cotton. 2. The hairy growth of the pubic 

 region. 3. In biology, a bunch of silky filaments 

 secreted by the foot, in several molluscs. A name 

 formerly given to the mycelium of large fungi. B. 

 Gland. See Gland. 



Byssys (bis'-is) [3ioooc, flax]. Same as Byssus. B. 

 Gland. See Gland. 



Bythus (bith'-us) [3v66g, the depth]. The lower or 

 vesical portion of the abdomen. 



