SYS- 



320 



TAR- 



of the heart causing the circulation 

 of the blood ; contraction of any 

 contractile cavity (phys.}. 



systylous (sis'tiliis) a. [Gk. syn, 

 with ; stylos, a column.] With co- 

 herent syles ; with fixed columella- 

 lid (bot.}. 



syzygy (siz'ijT) n. [Gk. syn, with ; 

 zygon, yoke.] A close suture of two 

 adjacent arms, found in Crinoids ; 

 a number of individuals, two to five, 

 adhering to one another in strings 

 in the association of Gregarines 

 (zool.}. 



tabula (tab'ula) n., tabulae (tab'ule) 

 plu. [L. tabula, a table.] Hori- 

 zontal partitions traversing the 

 vertical canals of Hydrocorallina 

 and of tabulate corals (zool.}. 



tabulare (tab'ula're, tab'ula'ra) n. [L. 

 tabula, a table.] A bone above 

 each otic capsule in higher verte- 

 brates (zool.}. 



tachy genesis (tak'ijen'esis) n. [Gk. 

 tachys, quick ; genesis, descent.] 

 Development with omission of 

 certain embryonic stages, as in 

 some Crustaceans (zool.}. 



tactile (tak'til) a. [L. tangere, to 

 touch.] Appl, capsular corpuscles 

 or cones constituting special sense 

 end-organs (anat., zool.}. 



tactual (tak'tual) a. [L. tangere, to 

 touch.] Pert, the sense of touch 

 (Phys.}. 



taenia (te'nla) n. [L. taenia, a ribbon.] 

 A Tape-worm ; appl, a band or line 

 of nerve and muscle (anat.}. 



taeniate (te'niat) a. [L. taenia, a 

 ribbon.] Ribbon - like ; striped 

 (zool.}. 



taenidium (tenid'ium) n., taenidia 

 plu. [L. taenia, a ribbon.] Spiral 

 threads strengthening the chitinous 

 layer of insect tracheae (zool.}. 



taenioid (te'moid) a. [Gk. tainia, a 

 ribbon ; eidos, form.] Ribbon- 

 shaped ; like a Tape-worm (zool.}. 



taenioles (te'molz) n.plu. [L. taeniola, 

 a small ribbon.] Four longitudinal, 

 inter-radial, gastric ridges of a 

 scyphula (zool.}. 



tagmata (tag'mata) n. plu. [Gk. 

 tagma, a corps.] Units ; parts ; 

 segments (biol.\ 



talocalcaneal (tal'okal'kane'al) a. [L. 

 talus, ankle-bone ; calcaneum, heel.] 

 Pert, talus or astragalus and cal- 

 caneus, or ankle-bone and heel. 



talon (tal'on) n. [L. talus, ankle.] 

 Claw of bird of prey ; the posterior 

 heel of a molar tooth (zool.}. 



taloscaphoid (tal'oskaf'oid) a. [L. 

 talus, heel ; Gk. skaphe, a boat ; 

 eidos, resemblance.] Pert, astra- 

 galus and scaphoid bone (anat.). 



talus (ta'lus) n. [L. talus, ankle.] 

 The ankle - bone or astragalus 

 (anat.}. 



tapetal (tape'tal) a. [L. tapetum, a 

 carpet.] Pert, a tapetum ; appl. 

 cells (bot.}. 



tapetum (tape'tvim) n. [L. tapetum, 

 a carpet.] The outer and posterior 

 part of the choroid ; the main 

 body of fibres of the corpus callosum 

 (anat.} ; a special nutritive layer 

 investing the sporogenous tissue of 

 a sporangium (bot.}. 



taproot (tap'root) n. [M.E. tappe, a 

 short pipe ; A.S. wyrt, a root.] An 

 elongated parent root with second- 

 ary roots in acropetal succession 

 (bot.}. 



tarsal (tar'sal) a. [Gk. tarsos, sole of 

 the foot.] Pert, the tarsus (zool.} ; 

 appl. arteries, bones, glands (anat.}. 



tarsale (tarsa'le, tarsala) n., tarsalia 

 (tarsa'lla) plu. [Gk. tarsos, sole of 

 the foot.] Ankle-bones. 



tarsi (tar's!) n. plu. [Gk. tarsos, sole 

 of the foot.] Two thin elongated 

 plates of dense connective tissue 

 helping to form and support the 

 eyelid (anat.}. 



tarsometatarsal (tar'somet'atar'sal) 

 a. [Gk. tarsos, sole of the foot ; 

 meta, beyond.] Pert, an articula- 

 tion of tarsus with metatarsus (anat., 

 zool.}. 



tarsometatarsus (tar'somgt'atar'sus) n. 

 [Gk. tarsos, sole of the foot ; meta, 

 beyond.] A short straight bone 

 of a bird's leg formed by fusion 

 of the distal row of tarsals with 

 the second to fifth metatarsals 

 (zool.}. 



tarsophalangeal (tar'sofalan'jeal) a. 

 [Gk. tarsos, sole of the foot ; phal- 



