334 GLOSSARY 



Spi-ril'lum (Latin spira, coil), a spiral or corkscrew-shaped bac- 

 terium. 

 Spi-rom'e-ter (Latin spirare, to breathe, and -meter), an instrument 



used to measure the capacity of the lungs. 

 Sta'pes (Latin, stirrup), the third bone of the ear, shaped like a 



stirrup. 

 Ster'num (Greek sternon, breast), the breast bone. The ribs are 



attached to it in front. 

 Stim'u-lus (Latin, a goad), any substance that can excite a nerve or 



a muscle to greater action. 

 Sub-lin'gual glands (Latin sub, under, and lingua, tongue), the 



salivary glands under the tongue. 

 Sub-max'il-la-ry glands (Latin sub, under, and maxilla, jawbone), 



the salivary glands under the lower jaw. 

 Su'ture (Latin suere, sutus, to sew), the way the bones of the skull 



are joined together; a kind of joint. 



Syn-o'vi-al (Greek syn, with, and Latin oinun, egg), a fluid resem- 

 bling the white of egg, secreted by the membrane in movable 



joints. 

 Ten'don (Latin tendere, to stretch), the fibrous tissue at the ends of 



muscles ; a sinew. 

 Tho-rac'ic duct (Latin thorax, thoracis, breast), the large lymphatic 



trunk that passes through the thorax and empties into the left 



subclavian vein. 

 Tib'i-a (Latin), the shin bone. 

 Tis'sue (French tissu, from Latin texere, to weave), a collection of 



like cells for a common purpose. 

 Tra'che-a (Greek trachys, rough), the windpipe. 

 Tri'ceps (Latin tres, tria, three, and caput, head), one of the muscles 



of the upper arm. It straightens the arm at the elbow. 

 Tri-chi'na, pi. trichinae (Greek trichinos, hairy), a parasite sometimes 



found in pork. It is the cause of the disease called trichinosis. 

 Tri-cus'pid (Latin tres, tria, three, and cnspis, point), the valve 



between the right auricle and ventricle of the heart. 

 Tur'bi-nate bones (Latin turbinatus, from turbo, a whirl), two small 



bones in the nasal cavities. 

 Ty'phoid (Greek typhos, stupor arising from fever), a disease of the 



small intestine. 

 Ul'na (Latin, elbow), one of the bones of the forearm. 



