I4O GLOSSARY. 



Sustenta'culmn tali (L. support of the ankle-bone). A flat- 

 tened process of the calcaneum. 



Su'tura | (L. sutura, a seam). The name given to immovable 

 Su'ture j articulations of bone, as those of the bones of 



the skull. In Surgery the term is applied to any seam for 



closing a wound. 

 Swim'merets. The abdominal appendages which in the lobster 



and other Crustacea are used in swimming. 

 Sympathe'tic (Gr. sun, together ; pathos, suffering). The 



name given to the ganglionic nervous system on account 



of its connexion with the cerebro-spinal system. 

 Sym'physis (Gr. sun, together ; phusis, growth). A name given 



to certain junctions of bones, where there is not a complete 



articulation, but rather a growing together of adjacent 



bones, as the symphysis pubis and symphysis of the lower jaw. 

 Symplec'tic (Gr. sympleko, to entwine together). A bone in 



the Teleostean fishes which forms the lower ossification of 



the suspensorium, and which articulates below with the 



quadrate bone by which it is firmly held. 

 Synan'gium (Gr. sunago, to bring together, collect). The 



terminal part of the truncus arteriosus of the lower Vcrtc- 



brata, from which the arteries diverge. 

 Synapti'cul (Gr. snnaptos, joined together). Processes of 



calcareous material which grow towards each other from 



the sides of the septa of the Actinozoa. 

 Synarthro'sis (Gr. sun, together; art/iron, a joint). A term 



applied to a joint which allows of little or no motion. 

 Synchondro'sis (Gr. sun, together; chondros, gristle). The 



term applied to an articulation formed by the addition of 



a plate of cartilage, as in the sacro-iliac synchondrosis. 

 Synchronous (Gr. sun, together; chronos, time). Occurring 



at the same time. 

 Syn'cope (Gr. sunkope, a swoon). Unconsciousness from 



failure of the heart's action. 

 Syncy'tium (Gr. sunchusis, a mixing together). A term applied 



by Haeckel to the ectoderm of the Calcispongre, a family 



of the Porifera. 

 Syndac'tylus (Gr. sun, together; daktulos, & finger). Having 



the digits connected by a web. 

 Syndes'mo-pharynge'us (Gr. sundesmos, a band). An occasional 



muscle of the pharynx in man. 

 Synos'tosis (Gr. sun, together; osteon, a bone). A term applied 



to the premature obliteration of the sutures of the skull. 



