GLOSSARY 453 



Quadrangular. Having four angles. 



Quadriceps (extensor tendon). The four-headed extensor tendon. 



Racemose. (From the Latin word racemus, "a bunch of grapes.") 

 Resembling a bunch of grapes. 



Radius (bone). (From the Latin word radius, "the spoke of a 

 wheel.") The outer bone of the forearm. 



Rami Communicantes. (From the Latin words ramus (pi. i), "a 

 branch;" communicans (pi. antes), "communicating.") Communi- 

 cating branches. The branches of a spinal nerve connecting it with 

 the sympathetic ganglia. 



Reflex (action). (From the Latin words re, "back;" flectere, "to 

 bend.") Anything bended or thrown back. Reflex act: An act 

 following immediately upon a stimulus without the intervention 

 of the will. 



Refractory (apparatus). (From the Latin words re, "back;" fran- 

 gere, "to break.") Literally, to break the natural course of, as rays 

 of light; to cause them to deviate from a direct course, as the refractory 

 apparatus of the eye deviates the rays of light as to how they shall 

 fall upon the retina (diffuse or concentrated), based upon the nearness 

 or distance of an object to or from the eye. 



Renal. (From the Latin word ren, "a kidney.") Pertaining to 

 the kidney. 



Renalis (fascia). Fascia of the kidney. 



Renes (pi. of ren.). The kidneys. 



Reniform. Kidney-shaped. 



Reticular. (From the Latin word reticulum, dim. of rete, "a net.") 

 Resembling a net, formed by a net-work, as reticular tissue. 



Reticulum. A net-work. 



Retiform. Having the form of a net. 



Rhythmical. Pertaining to rhythm. In speaking of the heart and 

 pulse it refers to the dividing of their actions (contraction and relaxa- 

 tion) into short portions or periods by a regular succession of motions. 



Rima Glottidis. The chink of the glottis. The cleft or narrow 

 opening between the true vocal cords in the larynx. 



Risorius (muscle). (From the Latin word ridere, "to laugh.") 

 The laughing muscle. 



Rotation. (From the Latin words rotare, "to turn;" from rota, "a 

 wheel.") The act of turning about an axis, passing through the centre 

 of a body or extremity. 



Rugae. (Plural of ruga, "a fold or ridge.") Folds. 



Saccharoses. (From the Greek word meaning sugar.) A group of 

 carbohydrates occurring in the juice of many plants, chiefly sugar-cane, 

 some varieties of maple and beet-sugar. 



Sacrum (bone). (From the Latin word sacer, "sacred;" os, under- 

 stood.) 



Sagittal. (From the Latin word sagitta, "an arrow.") Arrow-like, 

 as the sagittal suture of the skull. Referring to the anteroposterior 

 middle plane of the body, or organ, etc. 



Saphenous. Apparent, superficial; applied to the saphenous vein 

 of the thigh and leg, lying just beneath the skin and superficial 

 fascia. 



Sarcolemma. The delicate membrane enveloping a muscle fiber. 



