TRA 



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TRA 



blastema in the membranous con- 

 dition of the primordial cranium ; 

 a reticular framework of whitish 

 elastic bands, forming a portion of 

 the substance of the spleen ; in 

 bot., fibrous bands crossing from 

 the ventral to the dorsal side of 

 the microsporangia and macro- 

 sporangia of certain Lycopodi- 

 acese, and causing an imperfect 

 segmentation : trabecular, a., 

 trab'ek'ul-ar, of or pert, to the 

 bands or fibres forming a con- 

 necting or bounding medium in 

 bodies or organs : trabeculate, a. , 

 trab-ek'ul'dt, in bot., having 

 horizontal cross bars, as on the 

 inner surface of the teeth of the 

 peristome. 



trabs cerebri, trabz ser'$b-ri (L. 

 trabs, a beam or rafter ; cerebrum, 

 the brain, cerebri, of the brain), 

 the corpus callosum of the 

 brain. 



trachea, n., trak'e'a (Gr. trachus, 

 masc., trachela, fern., rough, 

 nigged ; tracheia, the windpipe), 

 the windpipe ; the common air 

 passage of both lungs, consisting 

 of an open tube commencing at 

 the larynx above, and dividing 

 below into two smaller tubes, the 

 right and left bronchus one for 

 each lung : tracheae, n. plu. , 

 trak-e'e, the breathing tubes of 

 Insects and other articulate 

 animals ; in bot. , spiral vessels 

 in plants : tracheitis, trd&Z-tt'is, 

 or trachitis, n., trak'it'is, inflam- 

 mation of the trachea. 



Trachearia, n. plu., trak'e-dr'-i-a 

 (Gr. tracheia, the windpipe), the 

 Division of Arachnida which 

 breathe by means of tracheae : 

 tracheides, n. plu., trak'8-id'es 

 (Gr. eidos, resemblance), in bot., 

 vessels which serve as air-conduct- 

 ing tubes, after the protoplasm 

 and cell-sap have disappeared. 

 trachenchyma, n., trak-eng'-ktm-a 

 (Gr. tracheia, the windpipe ; 

 engchuma, what is poured in 

 from cheuma, juice, tissue), the 



trachea or spiral vessels of plants ; 

 tissue composed of spiral vessels. 



tracheotomy, n., trak f >e-oom>i, 

 (Gr. tracheia, the windpipe ; 

 tome, a cutting), the operation 

 of making an opening in the 

 windpipe. 



tragicus, a., tradf-ik-tis (Gr. 

 tragds, a goat), a short, flattened 

 band of muscular fibres, situated 

 upon the outer surface of the 

 tragus, the direction of its fibres 

 being vertical : antitragicus, a. , 

 ant'-i'tradf-ik-us, this muscle 

 arises from the outer part of the 

 * antitragus, ' which see. 



Tragopogon, n., trag'd-pog'.on(GT. 

 tragos, a goat ; pogon, a beard), 

 a genus of ornamental plants, 

 Ord. Compositse, Sub-ord. Cichor- 

 acese, so named from the long 

 silky beard of the seeds : Trago- 

 pogon porrifolius, por'-rl-fdl'-i-us 

 (L. porrum, a leek ; fdlium, a 

 leaf), a species whose root pro- 

 duces Salsify, and is called the 

 ' oyster plant ' in America. 



tragus, n., trdg'-us (Gr. tragos, a 

 goat), a small pointed eminence 

 in front of the concha of the ear, 

 and projecting backwards over 

 the meatus, so named because 

 generally covered, on its under 

 surface, with a tuft of hair 

 resembling a goat's beard. 



trama, n., trdm'a (L. trdma, the 

 woof or filling of a web), in bot. , 

 the central tissue of the lamellae 

 of gill-bearing fungi. 



trance, n., trans (old F. transi, 

 fallen into a swoon ; F. transe, 

 a swoon ; L. transeo, I pass over), 

 a cataleptic condition of the body 

 of peculiar symptoms. 



transudation, n., trans'*ud'd f -shun 

 (L. trans, through ; sudo, I 

 sweat), the act or process of a 

 fluid or vapour oozing through a 

 porous substance or tissue. 



transversalis abdominis, tranz'- 

 vers-dV-is ab-dom'-in-is (L. trans- 

 versdlis, lying across, directed 

 crosswise from trans, across, 



