GLOSSARY. 



317 



Symphysis, o-vv together, and 

 $uovs growth ; a name applied 

 to certain instances of incom- 

 plete articulation dissimilar in 

 their nature, as the symphysis 

 pubis and symphysis of the 

 lower jaw. 



Synchronous, cvv together, and 

 Xpo'i/ov time; occurring at the 

 same time. 



Syncope, o-vyKOTrtj a swoon ; un- 

 consciousness, from failure of 

 the heart's action. 



Synpstosis, avv together, and 60-- 

 -reov bone ; used with reference 

 to the bones of the skull; means 

 the premature obliteration of 

 sutures. 



Synovia, a-vv together, and uwv 

 an egg; secretion like white of 

 egg; the fluid lubricating the 

 interior of a joint. 



Syntonin, adv together, andreii/co 

 I stretch ; a peculiar variety of 

 fibrin obtained from muscular 

 fibre. 



Tsenia, a ribbon ; tcenia hippo- 

 campi and tcenia semicircularis, 

 parts in the brain. 



Tapetum, a carpet ; the shining 

 layer existing in the choroid 

 coat of the eye in many ani- 

 mals. 



Tarsus, T-apo-J? the flat of the 

 foot ; the seven bones which 

 form the instep and heel. 



Teleology, -re'Xos an end accom- 

 plished, and \6yo<5 discourse; 

 the study of function. 



Temporal, tern-pus time; whence 

 fampora the temples or sides of 

 the head where the ravages of 

 time are liable to be shown by 

 the whitening of the hair; the 

 name of the bone at the side 

 and base of the skull, in which 

 the ear is situated. 



Tendon, tendo a noun from tendo 

 I stretch ; a variety of white 

 fibrous tissue through the me- 

 dium of which muscle is at- 

 tached. 



Tentorium a tent ; tentorium cere- 

 he process of dura mater 



which separates the cerebellum 

 from the cerebral hemispheres. 



Testis a witness; the gland secret- 

 ing the spermatozoa. 



Tetanus, TCTUVOS tension (reivw 

 I stretch) ; the spasmodic or in- 

 voluntary continued active con- 

 traction of muscular fibre. 



Thalanms, VaXa/mos a chamber ; 

 optic thalamus, the name of a 

 portion of the brain from which 

 the fibres of the optic tract 

 partly arise. 



Thaumotrope, Gav/ma a wonder, 

 and rp&iru* I turn; an instru- 

 ment, in which figures in series 

 of different positions are painted 

 near the circumference of a 

 disc, and the reflections of 

 these, being looked at in a 

 mirror through openings in a 

 card revolving with them, are 

 seen in the form of figures, each 

 of which performs the movement 

 represented in stages on the 

 disc. This instrument is also 

 called a stroboscope (<iTpo/3ea> I 

 whirl). 



Theca a sheath ; a synovial sheath 

 of a tendon. 



Thorax, 6wpa% a breast-plate; the 

 cavity which contains the heart 

 and lungs ; or, when the skeleton 

 is spoken of, the ribs, dorsal ver- 

 tebras, costal cartilages, and 

 sternum. 



Thymus, tiv/uLos heart or soul ; the 

 thymus gland, a ductless gland 

 in the upper part of the chest, 

 in early life. 



Thyroid, 0upeJs a shield, and elSos 

 form; the thyroid cartilage, the 

 largest cartilage of the larynx ; 

 the thyroid body, a ductless 

 gland on the front and sides of 

 the upper part of the trachea. 



Tibia a flute ; the large inner bone 

 of the leg, the shin-bone. 



Tonicity, TOVO? tightening; mus- 

 cular contraction, of a slight de- 

 gree, persistently continuous. 



Tonsil, tonsilla a structure on each 

 side of the fauces ; also called 

 amygdala, from being the size 

 of an almond. 



