VAS 



437 



VEN 



a vessel ; forma, shape), in pot., 

 applied to a vegetable tissue 

 called dotted vessels ; shaped 

 like a blood-vessel. 



vaso-motor, vcls'-d-mot'-tir (L. vas, 

 a vessel ; motdr, a mover from 

 moto, I keep moving), applied to 

 nerves which govern the motions, 

 and regulate the calibre of the 

 blood-vessels ; the nerve fibres 

 supplying the muscular coats of 

 the blood-vessels. 



vastus, n., vast' us, vasti, n. plu., 

 vast'i (L. vastus, immense), a 

 name applied to two portions of 

 the 'triceps extensor cruris,' thus 

 vastus externus, vdst'us eks- 

 tern'us (L. externus, outward) ; 

 and v. interims, tn-tem'fts (L. 

 internus, inward), the names desig- 

 nating a fleshy mass upon each I 

 side of it : v. externus cruris, 

 krur'-is (L. crus, the leg or shin, 

 cruris, of the leg), the full name of 

 the vastus externus. 



Vateria, n., vat-er r -i-a (aivc Vater, 

 a German botanist), a genus of 

 Indian trees, Ord. Dipterocarp- 

 acese : Vateria Indica, ind'-ik'ti 

 (L. Indicus, of or from India), a 

 species which yields a gum resin, 

 known as Indian Copal or Piney 

 resin, used as a varnish, and 

 in the manufacture of candles, 

 and as incense ; in med. , used 

 for rheumatic and other affec- 

 tions. 



veil, n., val (old F. veile, a veil ; 

 L. velum, a covering, a curtain), 

 in bot., the partial covering of 

 the stem or margin of the cap 

 among Fungi ; also said of the 

 indusium of ferns. 



vein, n., van (F. veine, a vein ; 

 L. vena, a blood-vessel), in anat. , 

 one of the vessels of the body 

 which convey the blood back to 

 the heart ; in bot. , one of the 

 small branching ribs of a leaf. 



vellus, n., vel'-Lus (L. vellus, a 

 fleece), in bot., the stipe of 

 certain Fungi. 



velum, n., vel'um (L. velum, a 



vail), in zoo?., the membrane 

 which surrounds and partially 

 closes the mouth of the disc of the 

 Medusae, etc. ; in bot. , the cellular 

 covering of the gille of an agaric 

 in its early state : velum inter- 

 positum, m'-ter-pos'-fc-um (L. in- 

 terpdsztus, a putting between, 

 interposed), a vascular membrane 

 reflected from the pia - mater, 

 into the interior of the brain 

 through the transverse fissure : 

 v. pendulum palati, p^nd'ul-um 

 pal-at'-i (L. pendulus, hanging 

 down, pendulous ; pdlatum, the 

 palate, pdldti, of the palate), in 

 anat., the soft palate, a move- 

 able fold suspended from the 

 posterior border of the hard 

 palate, forming an incomplete 

 septum between the mouth and 

 pharynx. 



velutinus, a., v$l'ut-in'us (mid. L. 

 velutinus, velvety from L. vellus, 

 a fleece), in bot., velvety ; applied 

 to plants having a dense covering 

 of short down like velvet : vel- 

 utinous, a., vel-ut'in-us, having 

 a velvety appearance. 



vena azygos major, ven'-d dz'fy-b's 

 mddj'or(L. vena, a vein ; Gr. azug- 

 os, unyoked; L. major, greater), 

 in anat. , a vein on the right side 

 of the body, commencing in the 

 lumbar region : vena cava, Mv'd 

 (L. cdvus, hollow), a name applied 

 to each of the two large veins 

 which convey the blood back to 

 right side of the heart the vena 

 cava inferior returning the blood 

 from the lower limbs, and from the 

 viscera of the abdomen and pel vis ; 

 the vena cava superior returns the 

 blood from the head, the neck, 

 the upper limbs, and the thorax : 

 v. cordis magna, kdrd'-is mag- 

 nd (L. cor, the heart, cordis, of 

 the heart ; magnus, great), the 

 great cardiac vein which coils 

 round the left side of the base of 

 the ventricle, and returns the 

 blood from the substance of 

 the heart to the right auricle : 



