GLOSSARY. 267 



Quad'riceps. [From the Lat. quatuor, "four," and caput, the "head."] A 

 term applied to the extensor muscle of the leg, having four heads or 

 parts. 



Ra'dius. [Lat. a " rod," the " spoke of a wheel."] The outer bone of the 



fore-arm, so called from its shape. 

 Rale. [From the Fr. rdler, to " rattle in the throat."] A rattling, bubbling 



sound attending the circulation of air in the lungs. Different from the 



murmur produced in health. 

 Rec'tus. [Lat.] Straight. 



Re'nal. [From the Lat. ren, rents, the " kidneys."] Pertaining to the kid- 

 neys. 

 Ren'nin. (Rennet.) The milk curdling enzyme which constitutes the active 



principle of rennet. 

 Retic'ular. [From the Lat. reticulum, a " small net."] Resembling a small 



net. 

 Ret'iform. [From the Lat. rete, a " net," and forma, " form."] Having the 



form or structure of a net. 

 Ret'ina. [From the Lat. rete, a " net."] The most internal membrane of 



the eye ; the expansion of the optic nerve. 

 Ri'ma Glot'tidis. [Lat. rima, a " chink " or " cleft."] The opening of the 



glottis. 

 Ru'gae. [Lat. pi. of ruga, a "wrinkle."] A term applied to the folds or 



wrinkles in the mucous membrane, especially of the stomach and vagina. 



Sa'crum. [Lat. neut. of sacer, " sacred."] The large triangular bone above 

 the coccyx, so named because it was supposed to protect the organs con- 

 tained in the pelvis, which were offered in sacrifice and considered 

 sacred. 



Sag'ittal. [From the Lat. sagitta, an " arrow."] Arrow-shaped. 



Sal'ivary. Pertaining to the saliva, the fluid secreted by the glands of the 

 mouth. 



Saphe'nous. [From the Gr. saphes, " manifest."] A name given to the two 

 large superficial veins of the lower limbs. 



Saponifica'tion. [From the Lat. sapo, saponis, "soap," and/acfo, to "make."] 

 Conversion into soap. 



Sarcolem'ma. [From the Gr. sarx, sarkos, "flesh," and lemma, a "cover- 

 ing."] The covering of the individual muscle fibrils. 



Sar'cous. [From the Gr. sarx, sarkos, "flesh."] Fleshy, belonging to flesh. 



Sarto'rius. [From the Lat. sartor, a "tailor."] The name of the muscle 

 used in crossing the legs, as a tailor does when he sits and sews.' 



Scap'ula. [Lat.] The shoulder-blade. 



Sclerot'ic. [Lat. scleroticus, from Gr. skleroo, to " harden."] Hard, tough. 



Seba'ceous. A term applied to glands secreting sebum. 



Se'bum or Se'vum. [Lat. sevurn, "suet."] A fatty secretion resembling 

 suet, which lubricates the surface of the skin. 



Semilu'nar. [From the Lat. semis, " half," and luna, the " moon."] Having 

 the shape of a half-moon. 



