URI 



432 



UST 



action of the kidneys : ureous 

 diuresis, ur e'-us dl'ur* tz'is, amon g 

 animals, a diuresis characterised 

 "by a high colour of the urine, with 

 a peculiar slimy character, and 

 strong odour. 



uric, a. , see under ' urea. ' 



urine, n. , ur'-in (L. urina, Gr. our on, 

 urine), the fluid secreted from 

 the kidneys : urina cibi, ur'in'a 

 sib'l (L. cibus, food, cibi, of food), 

 the urine of food; the urine passed 

 shortly after partaking of food : 

 urina potus, pot'-us (L. potus, 

 drink, potds, of drink), the urine 

 of drink; the urine passed shortly 

 after drinking freely of a fluid : 

 urina sanguinis, sang'-gwin-is 

 (L. sanguis, blood, sdngumis, of 

 blood), the urine of the blood ; 

 the urine passed after a fast, as 

 in the morning : urinal, n. , ur 

 In-dl, a vessel for receiving urine 

 into ; a public or private place 

 constructed for urinating in: 

 urinary, a., ur'-ln-dr-i, of or 

 pert, to urine: urinate, v., ur'> 

 m-dt, to pass urine : uriniferous, 

 a., ur^n-if-er-its (L.fero, I bear), 

 carrying or conveying urine. 



Urodela, n. plu., ur'-o-del'-a, (Gr. 

 ouron, urine ; delds, visible, ap- 

 parent), in zool, the Order of the 

 tailed Amphibians, as newts, etc. 



urohyal, a., ur'-o-hi'-al (Gr. oura, 

 the stern, the tail ; hyoides, the 

 hyoid-bone), in most fishes, the 

 constituent bone of the haemal 

 spine, extending backwards. 



uroscopy, n., ur-os'-kop-i (Gr. 

 ourdn, urine ; skoped, I view), 

 the determination of diseases 

 from the inspection of the urine. 



Urticacesa, n. plu., ert'-ik-d'-se-e 

 (L. urtica, a stinging nettle 

 from uro, I burn), the Nettle 

 family, an Order of plants : Urt- 

 ica, n., ert-ik'd, a genus of 

 plants, so named in reference to 

 the stinging properties of most 

 of the species : Urtica dioica, 

 di-oyk'-d (Gr. dis, twice ; oikia, 

 a house), the common stinging 



nettle, a very ancient textile 

 plant, young tops in spring eaten 

 when cooked as a vegetable, and 

 a colouring matter is obtained 

 from its roots : U. urens, ur'$nz 

 (L. urens, burning) ; and U. pil- 

 ulifera, pil^ulif^r-a (L. pilula, a 

 little ball;/ero, I bear), are British 

 species of stinging nettles, the 

 last named having capitate female 

 flowers, and the root is astringent 

 and diuretic: U. crenulata, kren' 

 ul'dt'a (mid. L. crVnula, a little 

 notch) ; and U. stimulans, stimf' 

 ul'anz (L. stimulans, pricking or 

 goading on), Indian species, sting- 

 ing powerfully : U. urentissima, 

 ur''%nt'is f 'Sim'd (L. urens, burn- 

 ing, urentis, of burning), an 

 Indian species, stinging so power- 

 fully as to be called Devil's leaf, 

 sometimes causing death : U. 

 cannabina, kan-nab'-m-a (L. 

 canndbis, the hemp ; cannabmus, 

 hempen) ; U. tenacissima, ten'as- 

 is'sim-a, (L. t$nax, holding fast, 

 tenacious, tendcis, of tenacious), 

 are species which furnish fibres 

 fit for cordage : U. gigas, jig'-ds 

 (L. gigas, a giant), a species in 

 Australia, was found to be 42 

 feet in circumference, forming a 

 large tree. 



urticaria, n., ert'iJc-dr^i-a (L. 

 urtica, a stinging nettle from 

 uro, 1 burn), the nettle-rash, a 

 troublesome cutaneous eruption, 

 giving rise to a sensation similar 

 to that felt after being stung by 

 nettles : urticating cells, ert'ik' 

 dt'ing, the Cnidse or thread-cells, 

 by whose possession certain Ccel- 

 enterata obtain their power of 

 stinging : urtication, n., ert r -ik 

 d'-slmn, the act of whipping a 

 limb with nettles. 



ustulate, a., ust'-ul-at (L. tistuldt- 

 um, to burn a little, to scorch), 

 in bot. , blackened as if burned : 

 ustulation, n., tist'ul'd'-tk&n, the 

 process of roasting or drying 

 moist substances to prepare them 

 for pulverising. 



