TUB- 



335 



ULN- 



posed of, tubular structures, as an 

 aster head (bot.), a tubipore Coral 

 (zool.} ; hollow and cylindrical. 



tubulus (tu'bulus) n. [L. tubulus, a 

 small tube.] A hymeneal pore 

 (bot,} ; a cylindrical ovipositor 

 (zool.} ; any small tubular structures, 

 as tubuli lactiferi, recti, seminiferi 

 (ana/.). 



tunic (tu'nik), tunica (tu'nlka) n. [L. 

 tunica, a coating.] An investing 

 membrane or tissue, as that of 

 kidney, ovary, testis, those of 

 arteries (anat.}. 



tunicate (tu'nikat) a. [L. tunica, a 

 coating.] Appl. bulbs with numer- 

 ous concentric layers (bot.) ; en- 

 veloped in a leathery test or. 

 mantle (zool.). 



tunicle (tu'nikl) n. [L. tunica, a 

 coating.] A natural covering ; an 

 integument. 



tunnel of Corti, a triangular tunnel 

 enclosed by the two rows of pillars 

 of Corti and the basilar membrane 

 (anat.). 



turbinal (tiir'blnal) a. [L. turbo, a 

 whirl.] Spirally rolled or coiled, 

 as bone or cartilage (anat., zool.). 



turbinate (tur'binat) a. [L. turbo, a 

 whirl.] Top-shaped (bot.) ; appl. 

 certain shells (zool.) ; appl. certain 

 nasal and olfactory bones (anat.). 



turgescence (turj6s'6ns) n. [L. tur- 

 gere, to swell.] Tension or pres- 

 sure in living cell tissue due to 

 transpiration (bot.). 



turgidity, turgescence. 



turgor, turgescence. 



turio (tu'rio), turion (tu'rion) n. [L. 

 turio, a shoot.] A young scaly 

 shoot budded off from an under- 

 ground stem (bot.). 



tylhexactine (til'heksak'tfn) n. [Gk. 

 tylos, knob ; hex, six ; aktis, a ray.] 

 A hexactine spicule with rays 

 ending in knobs (zool.). 



tylosis (tilo'sls) n. [Gk. tylos, a knob.] 

 Development of irregular cells in 

 a cell cavity (bot.). 



tylostyle (tl'lostll) n. [Gk. tylos, a 

 knob ; stylos, a pillar.] A spicule 

 pointed at one end, knobbed at 

 the other (zool.). 



tylotate (tflotat) a. [Gk. tylos, 

 knob.] Having a knob at each 

 end (zool.). 



tylote (tfl6t) n. [Gk. tylos, knob.] 

 A slender dumbbell-shaped spicule 

 (zool.). 



tylotic (tllot'ik) a. [Gk. tylos, knob.] 

 Affected by tylosis (bot.). 



tylotoxea (tl'ldtok'sea) n. [Gk. tylos, 

 knob ; oxys, sharp.] A tylote with 

 one sharp end, directed towards the 

 surface of the Sponge (zool.). 



tympanic (tlmpan'ik) a. [Gk. tym- 

 panon, a drum.] Pert, the tym- 

 panum. 



tympanohyal (tim'panohi'al) n. [Gk. 

 tympanon, a drum ; hyoeides, Y- 

 shaped.] Pert, tympanum and 

 hyoid (anat.) ; part of the hyoid 

 arch embedded in the petro-mastoid 

 (emb.). 



tympanum (ttm'panum) n. [Gk. tym- 

 panon, a drum.] The drum-like 

 cavity constituting the middle ear ; 

 the drum of the ear ; the membrane 

 of the auditory organ on tibia or 

 abdomen of Insect ; an inflatable 

 air-sac on the neck of some Tetra- 

 oninae (anat., zool.). 



type (tip) n. [L. typus, an image.] 

 The sum of the characteristics 

 common to a large number of 

 individuals, serving as a ground 

 for classification ; a primary model 

 (biol.). 



typhlosole (tlf'losol) n. [Gk. typhlos, 

 blind ; solen, channel.] A median 

 dorsal longitudinal fold of the 

 intestine projecting into the lumen 

 of Annulates ; a longitudinal ridge 

 in rectum and intestine of Anodon 

 (zool. ). 



typical (ttp'ikal) a. [L. typus, an 

 image.] Appl. a specimen con- 

 forming to type or primary ex- 

 ample ; exhibiting in a marked 

 degree the essential characteristics 

 of genus or species (biol.). 



Tyson's glands, glands round the 

 corona of the glans penis (anat.). 



U 



ulna (ul'na) n. [L. ulna, elbow.] A 

 long bone on the medial side of the 

 fore-arm parallel with the radius 

 t. t sool.). 



