

VISHUCKI 



1607 



VITREUM 



/ishucki {vis-huk'-e) [Ind.]. Synonym of Asiatic 



'era among Hindoo physicians, 

 /isibility (viz-ib-il'-it-e) [visibilitas ; videre, to see]. 



ability of being seen, 

 /ision [vizh'-un) \yisio; videre, to see]. I. Sight; 

 acuity of visual power. See also, Acuteness. 2. A 

 visual hallucination, or illusion. V., Binocular. 

 i See Binocular. V., Central, direct vision, or vision 

 when the image falls on the fovea centralis. V. for 

 Color, pertains to the chromatic sense. V., Direct, 

 i that when the image is formed at the macula. V., 

 Double. See Diplopia. V., Field of. See Field. 

 V. for Form, the acuteness of vision with white 

 light. V., Indirect, that when the image is formed 

 upon the peripheral portions of the retina. V., 

 Peripheral, that when the image is not formed at 

 the macula. V., Qualitative, vision in which there 

 is ability to distinguish objects. V., Quantitative, 

 mere perception of light. V., Solid, or V., Stereo- 

 scopic, the visual perception of the third dimens'on 

 of space, or the perception of relief or depth of 

 objects obtained by binocular vision. See Herings 



riment. V., Triple. See Triplopia. 

 isit [viz'-it) [videre, to see]. A call upon a patient, 

 isual (yizh'-u-al) [visualis ; visus, sight]. Pertain- 

 ing to vision. V. Acuteness, or Acuity. See 

 Acuteness. V. Amnesia. See Mind-blindness. V. 

 Angle. See Angle. V. Axis. See Axis. V. Field. 

 , See Field. V. Logagnosia. Synonym of Word- 

 biindness. V. Purple, a substance in the retina 

 reacting to light in a peculiar manner, and thought 

 f to be intimately connected with vision. See Rho- 

 •ii. 

 isus (vi'-zus) [videre, to see]. Vision. V. dimidia- 

 tus. Synonym of Hemiopia. V. diurnus. Synonym 

 of Hemeralopia . V. senilis. Synonym of Presbyopia. 

 ita (vi'-iah) [L.]. Life. 



ital (vi'-tal) [vitalis ; vita, life]. Pertaining to life. 

 V. Capacity, the volume of air that can be expelled 

 j after a full inspiration. V. Knot, a term applied by 

 I Flourens to the respiratory center in the oblongata. 

 V. Principle, the energizing principle on which 

 individual life depends. V. Statistics, the statis- 

 tics of vital facts, the science of numbers as ap- 

 plied to the life-history of communities and nations, 

 italism [yi r -tal-izm) [vita ,\iie\. In biology, the doc- 

 trine that ascribes the phenomena exhibited by living 

 organisms to the action of a supersensuous vital force, 

 italist (vi'-tal-ist) [vita, life]. A believer in the ex- 

 istence of vital force. 



stalky (vi-lal'-iie) [yitalitas, vitality]. The vital 

 force or principle of life ; also, the condition of hav- 

 ing life ; vigor ; activity. 



talize (vi'-tali:) [vita, life]. To endow with life, 

 tals [vita, life]. A vulgar term for the 



intestines and the organs essential to life, 

 tellarium vit -el -a' -re- urn ) [ vitellus, yolk : //. , 

 Harid~\. In biology, one form of the female germ- 

 elands in platode worms, in which the work of supply- 

 ling the egg-germs with nutritive yolk is carried on. 

 •mparative research has shown that the vitellaria 

 ire not newly formed accessory glands of the female 

 sexual apparatus, but that they are metamorphosed 

 avaries or portions of ovaries adapted to a special 

 Junction." (Lang.) Cf. Germarium. 

 tellary (vit'-el-a-re) [vitellus, yolk]. Pertaining to 

 the vitellus. 



tellicle (vit-el'-ik-l) [vitellus, yolk]. The yolk-sac ; 

 Jmbilical vesicle. 



telligenous (yit-el-if -en-us) [vitellus, yolk ; genus, 

 producing]. In biology, producing yolk. Cf. Vitella- 

 num and Vitellogene. 



Vitellin (vit-el'-in) [vitellus, yolk]. In biology, the 

 chief proteid of egg-yolk. According to Weyl, it also 

 occurs in chyle and the amniotic fluid. 



Vitelline (vit-el'-in) [vitellus, yolk]. Pertaining to the 

 vitellus, the yolk of an egg. V. Circulation, the 

 circulation through the yolk. V. Membrane. See 

 Zona pellucida. V. Spheres. See Sphere. 



Vitello-ducts (vit'-el-o-dttkts) [vitellus, yolk ; ductus, 

 a duct]. The yolk-ducts ; applied to the ducts of the 

 vitellaria of platode worms. 



Vitellogene [vit-el'-o-jen) [vitellus, yolk ; yevr/c, pro- 

 ducing]. In biology, yolk -producing. Cf. Vitel- 

 larium and Vitelligenous. 



Vitellogenous (vit-el-oj' -en-us). Same as Vitelligenous. 



Vitellolutein [vit-el-o-lu'-ie-in) [vitellus, yolk ; luteus, 

 golden-yellow]. The yellow pigment obtained from 

 the eggs of the spider-crab (J/aia squinado). 



Vitellorubin (vit-el-o-ru'-bin) [vitellus, yoik ; ruber, 

 red]. The reddish-brown pigment obtained from the 

 eggs of the spider-crab (Main squinado). 



Vitellus (z'it-el'-us) [vitellus, a yolk]. In biology, the 

 yolk of an egg, including both the formative and the 

 nutritive yolk. Specifically the yolk of the egg of 

 the common barnyard fowl (G alius domesticus). A 

 viscid, orange-colored liquid containing oil, choles- 

 terin, vitellin, and albumin. It is bland and nutritive. 

 It is used mainly to emulsionize oils and camphors. 

 In pharmacy, the yolk of egg, ovi vitellus. 



Vitex (li'-teks) [L.]. See Agnus castus. 



Vitiation {vish-e-a' -shun) [vitiatio; vitiare, to corrupt]. 

 The contamination of any substance, especially of the 

 air. 



Viticolous {vit-ik'-o lus) [vitis, the vine ; colere, to in- 

 habit]. Inhabiting or produced upon the vine. 



Viticula (vit-ik'-u-lah) [dim. of vitis, vine: pi., Vitic- 

 ulce\. In biology, a small, trailing vine, like that of a 

 melon or cucumber. 



Viticulose (vit-ik'-u- loz) [vitis, vine]. In biology, 

 producing long, trailing, vine-like twigs or stems. 



Viticulture (vit'-ik-ul-tur) [vitis, vine; cultura, cul- 

 ture]. The culture of the vine. 



Vitiligo (vit-il-i' '-go) [L. , tetter]. Piebald skin ; while 

 leprosy ; an acquired disease of the skin characterized 

 by the appearance of one or many well-defined, circu- 

 lar, oval, irregularly-shaped, or reticulated patches, 

 having a milky- white color, without other manifest 

 change in the integument ; the hairs growing upon 

 these patches are usually destitute of color. At the 

 periphery of the patches there is usually a hyperpig- 

 mented border, varying in color from a light-fawn 

 to a deep-chocolate. The disease is most common 

 in warm weather. See Leukoderma. V. capitis. 

 Synonym of Alopecia areata. 



Vitiligoidea (znt-il-ig-oi' -de-ah) [vitiligo, tetter; eidoc, 

 likeness]. Xanthoma of the eyelids. 



Vitrella [vit- reP- ah ) [vit reus, glassy : //. , Vitrellai\. 

 In biology, same as Retinophora. 



Vitreodentinal (vit-re-o-den' -tin-al) [vitreus, of glass ; 

 dens, tooth]. Pertaining to vitreodentine. 



Vitreodentine ( vit -re-o- den' -tin) [vitreus, of glass ; 

 dens, a tooth]. A variety of dentine of particularly 

 hard texture. 



Vitreous (-vit'-re-us) [vitreus ; vitrum, glass]. Glass- 

 like, hyaline. V., Artificial. See Evisceration. V. 

 Chamber, the portion of the globe of the eye posterior 

 to the crystalline lens. V. Degeneration, disease of 

 the intima of arteries. V. Humor, or Body, the 

 transparent, jelly-like substance filling the vitreous 

 chamber of the eye. V. Tables, the dense, osse- 

 ous laminas on the inner and outer surfaces of the 

 cranial bones. 



Vitreum (z'it'-re-um). Same as Vitreous Humor. 



