Glossary 351 



Thy'roid (Gr. Ovptos, a shield, and eUos, form). The largest of the carti- 

 lages of the larynx; its projection in front is called Adam's apple. 



Tis'sue (Fr. tissu, from Lat. texere, to weave). Any substance or texture 

 in the body formed of various elements, such as cells, fibers, blood ves- 

 sels, etc., interwoven with each other. 



To-bac'co (Indian tabaco, the tube, or pipe, in which the Indians smoked 

 the plant). A narcotic plant used for smoking and chewing, and in snuff. 



Toxin (Gr. rogucl?, poison). A poison formed by bacteria, in both living 

 tissues and dead substances ; a poisonous ptomaine. 



Tra'gus (Gr. rpdyos, a goat). The eminence in front of the opening of the 

 ear; sometimes hairy, like a goat's beard. 



Tro-chan'ter (Gr. rpoxcieii/, to turn, to revolve). Name given to two pro- 

 jections on the upper extremities of the femur. 



Tryp'sin (Gr. rptyis, a rubbing). The ferment principle in pancreatic juice 

 which converts proteid material into peptones. 



Tu'ber-cle (Lat. tuberculum, a little lump). A pimple, swelling, or tumor ; 

 the specific lesion produced by the tubercle bacillus. 



Tu-ber'cu-lo'sis (same derivation as tubercle). An infectious disease 

 due to the bacillus tuberculosis discovered by Koch. The form of 

 this disease with marked pulmonary symptoms is popularly known as 

 consumption. 



Tu'ber-os'i-ty (Lat. tuber, tuberis, a swelling, a protuberance). 



Tur'bi-na'ted (Lat. turbinatus, from turbo, turbinis, a top). Formed like 

 a top ; a name given to the bones in the outer walls of the nasal fossae. 



Tym'pa-num (Gr. r^^iravov, a drum). The cavity of the middle ear, resem- 

 bling a drum in being closed by two membranes. 



U're-a (Gr. otpov, urine). Chief solid constituent of urine ; nitrogenous 



product of tissue decomposition. 

 U-re'ter (Gr. ovprjr^p, a tube for the urine). The tube through which the 



urine is conveyed from the kidneys to the bladder. 

 U'vu-la (Lat. uva, a grape). The small pendulous body at the middle of 



the soft palate. 



Vac'cine vi'rus (Lat. vacca, a cow, and virus, poison). The virus used in 



performing vaccination, now usually derived directly from heifers affected 



with cowpox. 

 Varvu-lae con-ni-ven'tes (Lat. valvula, a small valve, and connivens, to 



bring close together). A name given to transverse folds of the mucous 



membrane in the small intestine. 

 Var'i-cose (Lat. varix, a dilated vein). Distended or enlarged, as a vein. 



