UNI- 



338 



URI- 



Having a single sharp point or tip ; 

 appl. leaves, etc. (bot.}. 

 unlnucleate (u'ninu'kleat) a. [L. unus, 

 one ; nucleus, nucleus.] Having 

 one nucleus (biol.}. 



uniparous (unrp'arus) a. [L. unus, 

 one ; parere, to beget.] Producing 

 one at a birth (zool.} ; having a 

 cymose inflorescence with one axis 

 at each branching (bot.}. 

 unipetalous (u'mpe't'alus) a. [L. unus, 

 one ; Gk. petalon, leaf.] Having 

 one petal (bot.}. 



unipolar (u'mpo'lar) a. [L. unus, one ; 

 polus, pole.] Having one pole only ; 

 appl. some nerve-cells (anat.}. 

 uniseptate (u'nisSp'tat) a. [L. unus, 

 one ; septum, a hedge.] Having 

 one septum or dividing partition 

 (biol.}. 



uniserial (u'mse'rial) a. [L. unus, 

 one ; series, rank.] Appl. fins with 

 radials on one side of the basalia 

 (zool.}. 



uniserrate (u'niseYat) a. [L. unus, 

 one ; serra, saw.] Having only one 

 row of serrations on the edge (bot.}. 

 uniserrulate (u'nlsgr'ulat) a. [L. unus, 

 one ; serrula, dim. of serra, saw.] 

 Having one row of small serrations 

 on the edge (bot.}. 



unisetose (Q'nTse'tos) a. [L. unus, 

 one ; seta, bristle.] Bearing one 

 bristle (zool.}. 



unisexual (Q'nisSk'sual) a. [L. unus, 

 one ; sexus, sex.] Of one or other 

 sex ; distinctly male or female 

 (biol.}. 



unispiral (u'ni spiral) a. [L. unus, 

 one ; spira, coil.] Having one 

 spiral only (bot.}. 



units of Spencer, the physiological 

 units which determined the form of 

 each living creature. These units 

 were regarded as intermediate be- 

 tween chemical molecules and cells, 

 and consequently must correspond 

 to groups of molecules. They are 

 quite useless as an interpretation 

 of heredity, but have this advantage 

 that they forced a more and more 

 searchinganalysis into the "bearers" 

 of heredity. 



univalve (u'nivalv') n. [L. unus, one ; 

 valvae, folding doors.] A shell 

 consisting of one piece or valve, 

 as a gastropod shell (zool.}. 



unpaired (un'pard) a. [L. un, not ; 



par, equal.] Situated in the median 



line of the body, and consequently 



single (zool.}. 



unpaired fins, the median dorsal and 



ventral fins (zool.}. 



urachus (u'rakus) n. [Gk. ouron, 

 urine ; echein, to hold.] The median 

 umbilical ligament (emb.} ; the 

 fibrous cord extending from bladder 

 to umbilicus (anat.}. 

 urceolate (ur'seb'lat) a. [L. urceolus, 

 small pitcher.] Pitcher-shaped ; 

 appl. calyx or corolla (bot.} ; shells 

 of various Protozoa (zool.}. 

 urceolus (ur'seolus) n. [L. urceolus, 

 small pitcher.] The external tube 

 of certain Rotifers (zool.} ; any urn- 

 shaped structure (bot.}. 

 urea (ure'a) n. [Gk. ouron, urine.] 

 A nitrogenous excretory substance, 

 the chief constituent of urine 

 (phys.}. 



uredinium (u'redln'ium) n. [L. uredo, 

 blight.] In Rusts, the mycelium- 

 bearing uredospores (bot.}. 

 uredo (ure'do) n. [L. uredo, blight.] 

 The summer stage of many rust 

 Fungi (bot.}. 



uredospores (ure'dosporz) n. plu. [L. 

 uredo, blight ; Gk. sporos, seed.] 

 Reddish summer spores borne on 

 each sporophore of Rusts, which fall 

 and spread the disease (bot.}. 

 ureter (ure'ter) n. [Gk. oureter, 

 ureter.] The duct conveying urine 

 from kidney to bladder or cloaca 

 (anat.}. 



urethra (ure'thra) n. [Gk. ourethra, 

 from ouron, urine.] The duct 

 leading off the urine from the 

 bladder, and in the male conveying 

 the semen in addition (anat.). 

 urinary (u'rlnari) a. [Gk. ouron, 

 urine.] Pert, urine ; appl. bladder, 

 organ, papillae, kidney tubules, etc. 

 (anat.}. 



urine (u'rin) n. [Gk. ouron, urine.] 

 A fluid excretion from the kidneys 

 in Mammals, a solid or semisolid 

 excretion in Birds and Reptiles 

 (phys.}. 



uriniparous (u'rinip'arus) a. [Gk. 

 ouron, urine ; parere, to beget.] 

 Urine - producing ; appl. to the 

 kidney tubules in the cortical 

 portion of the kidney (anat.}. 



