THOROUGHPIN. 189 



preventing friction, and allowing of easy motion of the 

 heads of the bones over one another. Synovia some- 

 times changes in quality, becomes thinner, and gives rise 

 to swellings of the joints. (See Blood and Bog Spavin.) 



Synchronous. — This name is applied to the action 

 cr beat of the heart, when it is in time with the beat or 

 pulsation of an artery. 



Systole. — The movement or contraction of the heart, 

 as the systolic murmur. 



Tabanidoe. — A species of fly which are a great an- 

 noyance to horses. 



Tabes. — Wasting of the muscles of the body. (See 

 Mesenterica.) 



Talpae. — A wart-like tumor, easily removed with a 

 sharp pair of scissors. 



Teeth. — (See Mouth Diseases.) 



TOOTH FORCEPS. 



Tetanus, — (See Lock Jaw.) 



Tetter. — (See Skin Diseases.) 



Thick Wind. — (See Heaves and Broken Wind.) 



Thick Leg. — (See Greas^e and Farcy.) 



Thiselo.— (See Fistula.) 



Thoroughpin. — ^An affection of the hock-joint, ac- 

 companying bog and blood spavin, characterized by soft, 

 fluctuating swellings, containing fluid or joint-oil in in- 

 creased quantity, and altered in quality. 



