GLOSSARY. 369 



Sacrum (sa'-kruni). A curved triangular bone, composed of five con- 

 solidated vertebrae, wedged between the two iliac (pelvic) bones, 



and forming the dorsal boundary of the pelvis. 

 Scapula (skap'-u-la). The shoulder-blade. 

 Sciatic (si-at'-ik}. Pertaining to the ischium; the sciatic nerve, the 



main nerve of the thigh. 

 Sclerotic (skle-rot'-ik). Hard, indurated; pertaining to the outer coat 



of the eye. 

 Semilunar (sem-i-lu'-nar}. Resembling a half-moon in shape; semilu- 



nar valves, pocket-like valves at the beginning of the aorta and 



pulmonary artery. 

 Serous (se'-rus). Pertaining to, characterized by, or having the nature 



of, serum. 

 Serum (se'-rum*). The yellowish fluid separating from the blood after 



the coagulation of the fibrin. 



Solar plexus (so'-lar). Solar, with radiations resembling the sun. 

 Sphincter (sfinyk'-ter'), A muscle surrounding and closing an orifice. 

 Splenic (splen'-ik). Pertaining to the spleen. 

 Steapsin (sep'-,sm). A diastasic ferment which causes fats to combine 



with an additional molecule of water and then split into glycerine 



and their corresponding acids. 

 Sternum (ster'-num}. The breast-bone. 

 Subclavian (sub-kla'-vi-an). Situated under the collar-bone ; subcla- 



vian artery and vein. 

 Sublingual (sub-ling 1 '-ywal). Lying beneath the tongue, as sublingual 



gland. 

 Submaxillary (sub-mak '-si-la-ri}. Lying beneath the lower maxilla, as 



submaxillary salivary gland. 



Supination (su-pi-na'-shun}. The turning of the palm upward. 

 Synovia ($i-no'-vi-a). The lubricating liquid secreted by the synovial 



membranes in the joints. 



Tarsus (ar'-sws). The instep, consisting of seven bones. 

 Temporal (tem'-po-ral). Pertaining to the temples, as temporal artery, 



vein, muscle, etc. 

 Tetanus (tet'-a-nus}. A spasmodic and continuous contraction of the 



muscles, causing rigidity of the parts to which they are attached. 

 Thein (the'-in). An alkaloid found in tea. 



Theobromin (Mr-o-bro'-mm). A feeble alkaloid obtained from cacao- 

 butter ; the essential substance found in cocoa and chocolate. 



