

XIPHISTERNUM 



1625 



YAWNING 



Xiphisternum {zif-is-tur' -nuni) [S;i<poc , sword ; aripvoVr, 

 breast-bone: //., Xiphisternal]. In biology: (a) 

 the most posterior of the sternal elements ; the meta- 

 sternum or ensiform cartilage. See Xiphoid and En- 

 mum, (b) See Xiphiplastron. 

 Xiphodes {zif-o'-diz) [^<ooc, sword ; ddog, like]. Hav- 

 ing the shape of a sword. 

 Xiphodymus | zif-od'-im-us) [;icx>c, sword ; didvuoc, 

 double]. A sysomic monstrosity with united pelvic 

 and thoracic cavities, two legs, and with an occasional 

 ; rudimentary - third leg. 



Xiphoid (zif'-oid) [s<ooo, sword; eidoc, like]. Ensi- 

 form ; sword-shaped. X. Appendix, or Process, the 

 ; third piece, or ensiform process, of the sternum ; xiph- 

 | isternum. It is cartilaginous in youth and osseous in 



mature age. 

 Ciphoidian {zif-oid'-ean) [f'oor, sword ; eifioc, like]. 

 ! Belonging or pertaining to the ensiform cartilage. 

 Ciphopagus (of -op*- ag- us) [ftpoc, sword; -djoc, 

 fixed]. A monomphalic monstrosity united by the 

 I xiphoid cartilages or the epigastrium. The Siamese 

 twins furnished an example. 



'.iphophyllous [zip 'off'-ii-us) [~h'>r, sword; (pv/./.ov, 

 leaf]. In biology, having sword-shaped leaves. 

 -Rays, or Rontgen Rays (rent f -jeri). The peculiar 

 rays or ether-waves discovered by Professor Rontgen, 

 of Wiirzburg. A vacuum-tube (called a Geissler, Hit- 

 1 torf, or Crooke tube) is used with two wires sealed 

 through the glass, these being connected with the two 

 - 1 poles of a battery. The rays from the cathode have 

 i a penetrating power through matter opaque to other 

 r rays, and by their use photographs (skiagraphs, 

 I shadowgrams, etc.) may be taken of bones, metallic 

 stances, etc., situated in the tissues, thus proving of 

 " service in the diagnosis of fractures of bones, the 

 ■lion of foreign bodies, etc. 

 ylem (zi'-lem) [^t7.or, wood]. In biology, that por- 

 tion of the fibro-vascular bundle which contains ducts 

 or tracheids. 



ylic (zi'-lik) [$v?jov, wood]. Pertaining to or derived 

 from wood. X. Acid. See Acid. 

 ylidic Acid {zi-Hd'-ik). See Acid. 

 ylidin {zil'-id-in) [fi'/or, wood], QH 9 .NH 2 . A me- 

 thylated homologue of anilin, obtained from dime- 

 thylanilin. It serves for the preparation of red azo- 



-tuffs. See Pigments, Conspectus of. 

 do- zi'-lo-) [gvfan; wood]. A prefix to denote con- 

 nection with or relation to wood, 

 dobalsamum (zi - lo - bal' '- saw - urn) [^i'/.ov, wood; 

 apov, balsam]. The dried twigs of Commiphora 



opobalsamum, the balm of Gilead of Asia; also, a 

 balsam extracted from the same. Unof. 



Xylocarp (zi f -lo-karp) \j-v'/ov, wood; Kapzoc,' fruit]. 

 In biology, a hard, woody fruit. 



Xylocarpous (zi-lo-kar'-pus) ffhXov, wood ; Kapiroc, 

 fruit]. Having woody or hard fruit. 



Xylogene (zi'-fo-fen) [£%&»>, wood; yewav, to produce]. 

 A woody substance found in vegetable cell-walls. 



Xyloid (zi'-loid) [zi?ov, wood ; ebloc, resemblance]. 

 Resembling or having the nature of wood ; ligneous. 



Xyloidin [zi-loi'-dim [;r'/.m\ wood ; eidog, form], C 6 - 

 H 9 N0 7 . A white, inflammable, pulverulent sub- 

 stance described by Braconnet (1833) and obtained by 

 the action of concentrated nitric acid upon starch or 

 various forms of woody fiber. Also called Xylidin. 



Xylol (zi'-lol) [ff'v.or, wood ; oleum, oil], C S H 10 . 

 Dimethyl benzene. A volatile hydrocarbon some- 

 what resembling benzol. It has proved serviceable in 

 smallpox. Dose TTLiij-x. X. -balsam, Canada bal- 

 sam dissolved in xylol. For its uses in microscopy, 

 see Mounting-media. 



Xyloma (zi - lo'-mah) [%v~/.ov, wood : //., Xylomata~\. 

 In biology, a sclerotoid, spore-producing body of 

 certain fungi [Polystigma and Ascomycetes) . 



Xylon {zi'-lon) [iji/.ov, wood]. I. Wood. 2. The 

 cotton plant. 3. A substance identical with wood- 

 cellulose. 



Xylonite {zi' -lon-it). Same as Zylonite. See Celluloid. 



Xylophagous {zi-loff'-ag-us) \_;i?.ov, wood ; <paye"iv, to 

 eat]. Wood-eating. 



Xyloquinone (zi-lo-kwin' -011) [fi/or, wood; auinone], 

 C 6 H 2 (CH3)j0 2 . A yellow, crystalline substance oc- 

 curring in three isomeric forms. 



Xylose (zi'-/oz) [;i/oi, wood], C 3 H 10 O 3 . One of the 

 glucoses, alloisomeric with arabinose. It is obtained 

 by boiling wood-gum (beechwood, jute, etc.) with 

 dilute acids. See Carbohydrates, Table of. 



Xylostein (zi-los' '-te-in) [jjvAov, wood ; ooreov, bone]. 

 An indifferent, bitter substance obtained from the ber- 

 ries of Lonicera xylosteum by Hiibschmann. 



Xylotherapy (zi-lo-ther'-ap-e') [f&Uw, wood ; depa-preia, 

 therapy]. Medical treatment by the application of 

 certain woods. 



Xylotomous (zi-lot / -o-mus) [z-vtov, wood ; reuvetv, to 

 cut]. Wood-cutting, as an insect. 



Xysma (ziz'-mah) {_^i<rua, scrapings: pi. , Xysmata]. 

 The fragmentary and flocculent pseudomembrane seen 

 in the stools in some cases of diarrhea. 



Xyster (zis'-ter) [$vgtt]p, a rasp]. A surgeon's rasp, or 

 scraping instrument. 



chemic symbol of Yttrium. Y-L-igament, the 

 -femoral ligament. See Ligament. 

 bin {yab'-in). An amorphous, bitter alkaloid ob- 

 ' ained from the bark of Andira excelsa. 

 m. The esculent root of several species of Dioscorea ; 

 lso, incorrectly, a coarse variety of the sweet potato. 

 Vild Yam. See Dioscorea. 



ng-tasi {yang-ta'-se) [Chinese]. A gelatinous sub- 

 ".ance employed in China and Japan in cookery. It is 

 r-om the alga Laurencia papillosa [Tansh- 

 •ai). 



:ort) [Turk.]. An oriental, fermented drink 

 repared from milk. See Koumiss, Kephyr, Leban, 

 latzocn, Galactozyme. 

 'Don I y ■- '-pon). See Yaupon. 

 "d [ME., yerd, yard]. Membrum virile; penis, 

 •-sitting, in massage, sitting with the arms stretched 



I 



out laterally and horizontally. Y.-walk, in physical 

 culture, a mode of progression with the arms extended 

 laterally. 



Yarrow (yar'-o). See Achillea. 



Yaupon (yaiiZ-pon) [Am. Ind.\ The Hexvomitoria, a 

 shrub or tree of the Southern U. S. Its leaves are pur- 

 gative and emetic; called also cassena. Unof. Y.- 

 tree. See Cassena. 



Yava-skin (yar'-ah-skiri). Same as Elephantiasis. 



Yaw. [African, yaw, a raspberry.] A frambesia sore. 

 Y.-weed. A West Indian shrub, Morinda royoc ; 

 used as a remedy for yaws. 



Yawey {ya?t/-e) [African, yan; a raspberry]. Pertaining 

 to or affected with yaws. 



Yawn [ME., zanon, to yawn]. To gape, to open the 

 mouth wide. 



Yawning (ya-uZ-ning). See Oscitation, Pandiculation. 



