URO- 



340 



VAG- 



urosteon (uros'teon) n. [Gk. oura, 

 tail ; osteon, bone.] A median 

 ossification on the back portion 

 of the keel-bearing part of the 

 sternum in Birds (zool.}. 



urosternite (u'roster'nlt) n. [Gk. 

 oura, tail ; sternon, breast.] A 

 ventral plate of an arthropodan 

 abdominal segment (zool.}. 



urosthenic (u'rosthen'ik) a. [Gk. 

 oura, tail ; sthenos, strength.] 

 Having the tail strongly developed 

 for propulsion (zool.}. 



urostyle (u'rostll) n. [Gk. oura, tail ; 

 stylos, pillar.] An unsegmented 

 bone, the posterior part of the 

 vertebral column of anurous Amphi- 

 bians ; the hypural bone in Fishes 

 (zool.}. 



Urthiere (oor'tere) n. plu. [Ger. 

 Urtkiere, protozoa.] A name given 

 by Oken to the Infusoria (biol.}. 



urticant (ur'tikant) a. [L. urtica, 

 nettle.] Appl. thread-cells with 

 power of stinging. 



use inheritance, the transmission of 

 acquired characteristics (biol.}. 



uterine (u'tSnn) a. [L. uterus, womb.] 

 Pert, uterus ; appl. artery, vein, 

 plexus of Mammals (anat., zool.}. 



uterine bell, a muscular bell-like 

 structure in the female of certain 

 thread-worms, communicating with 

 coelom and uterus (zool.}. 



uteroabdominal (u'teroabdom'inal) a. 

 [L. uterus, womb ; abdomen, 

 stomach.] Pert, uterus and ab- 

 dominal region (ariat.}. 



uterosacral (u'tSrosa'kral) a. [L. 

 uterus, womb ; sacrum, sacred.] 

 Appl. two ligaments of the sacro- 

 genital folds attached to the sacrum 

 (anat.}. 



uterovaginal (Q't6r6vaj'inal) a. [L. 

 uterus, womb ; vagina, vagina.] 

 Pert, uterus and vagina (anat.}. 



uterovesical (u'teroves'ikal) a. [L. 

 uterus, womb ; vesicula, vesicle.] 

 Pert, uterus and bladder (anat.}. 



uterus (u'te'rus) n. [L. uterus, womb.] 

 The organ in female Mammals in 

 which the embryo develops and is 

 nourished before birth ; any en- 

 larged portion of the oviduct 

 modified to serve as a place for 

 development of young or of eggs in 

 lower vertebrates (anat.}. 



uterus masculinus, a large median 

 sac attached to the dorsal surface 

 of the urino-genital canal of the 

 male (zool.} ; the utriculus pros- 

 taticus (anat.}. 



utricle (u'trikl) n. [L. utrzculus,a.small 

 bag or bottle.] An air-bladder ; 

 a membranous indehiscent one- 

 celled fruit (bot.} ; a membranous 

 sac of the ear-labyrinth ; the uterus 

 masculinus (zool.}. 



utricular (utrik'ular) a. [L. utriculus, 

 small bag.] Containing vessels 

 like small bags ; appl. modification 

 of laticiferous tissue (bot.}. 



utriculus (utrik'ulus) n. [L. utriculus, 

 small bag.] The utricle of the ear 

 (anat.} ; the air-bladder of aquatic 

 plants (bot.}. 



uva (u'va) n. [L. uva, grape.] A 

 pulpy indehiscent fruit with central 

 placenta, like the grape (bot.}. 



uvea (u'vea) n. [L. uva, grape.] The 

 pigmented epithelium covering the 

 posterior surface of the iris (anat.}. 



uvula (u'vula) n. [L. uva, grape.] 

 A lobe of the cerebellum ; a conical 

 pendulous process from the soft 

 palate (anat.}. 



.V 



vacuolar (vaku'olar) a. [L. vacuus, 

 empty.] Pert, or like a vacuole. 



vacuolated (vak'uola'ted) a. [L. vacu- 

 us, empty.] Containing vacuoles. 



vacuole (vak'uol) n. [L. vacuus, 

 empty.] One of the spaces found 

 in cell protoplasm containing air, 

 sap, or partially digested food 

 material (cyt.}. 



vagal (va'gal) a. [L. vagus, wander- 

 ing.] Pert, the vagus (anat.}. 



vagina (vaji'na) n. [L. vagina, a 

 sheath.] A sheath or sheath-like 

 tube ; a canal leading from the 

 uterus to the external opening of 

 the genital canal (anat.} ; the ex- 

 panded sheath-like portion of a 

 leaf base (bot.}. 



vaginal (vajl'nal, vaj'inal) a. [L. 

 vagina, sheath.] Pert, or supplying 

 the vagina ; appl. arteries, nerves, 

 etc. (anat.}. 



